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  • 1
    Online Resource
    Online Resource
    San Diego :Elsevier Science & Technology,
    Keywords: Vertebrates. ; Electronic books.
    Type of Medium: Online Resource
    Pages: 1 online resource (636 pages)
    Edition: 1st ed.
    ISBN: 9780124095977
    DDC: 596
    Language: English
    Note: Front Cover -- An Atlas of Comparative Vertebrate Histology -- Copyright Page -- Dedication -- Contents -- Introduction -- Preparing and Studying Tissues for Histology -- How Big Is Small? -- Preparing Tissue for Microscopic Examination -- Fixation -- Dehydration -- Embedding -- Sectioning -- Mounting -- Staining and Coverslipping -- Interpreting Microscopic Images -- How Microscopes Work? -- Lens and Image Defects -- Resolution -- Electron Microscopy -- Resolution in Transmission Electron Microscope -- Notes About Magnifications and Repetition of Images Used in This Book -- Acknowledgments -- I. Cells -- A. The Animal Cell -- Introductory Study -- "Typical" Animal Cell -- Study of Cellular Structure With the Light Microscope -- Cytoplasmic Organelles -- Cytoplasmic Inclusions -- Nucleus -- Study of Cellular Structure With the Electron Microscope -- Cell Membrane (Plasmalemma) -- Endoplasmic Reticulum and Ribosomes -- Mitochondria -- Golgi Complex -- Lysosomes -- Centrosomes and Fibrils -- Cytoplasmic Inclusions -- Nucleus -- Freeze Fracture -- B. Cell Division -- Mitosis -- Interphase -- Prophase -- Prometaphase -- Metaphase -- Anaphase -- Telophase and Cytokinesis -- Colchicine, Mitosis, and Karyotypes -- Duration of the Mitotic Cycle -- Amitosis -- Meiosis -- II. Tissues -- C. Epithelial Tissues -- Classification of Epithelia -- Shape of Epithelial Cells -- Stratification of Epithelial Cells -- Endothelium and Mesothelium -- Specialization of Epithelia -- Intercellular Specializations of Epithelia -- Desmosomes and Intercellular Bridges -- Terminal Bars and Junctional Complexes -- Gap Junctions -- Glandular Epithelia -- Unicellular Gland: Goblet Cell -- Multicellular Glands (Fig. C74) -- Holocrine, Merocrine, and Apocrine Glands -- D. Connective Tissues -- Embryonic Connective Tissue -- Mesenchyme -- Mucous Tissue. , Components of Adult Connective Tissues -- Connective Tissue Cells -- Connective Tissue Fibers -- Amorphous Intercellular Substances -- Loose Connective Tissues -- Areolar Connective Tissue -- Adipose Tissue -- Reticular Tissue -- Dense Connective Tissues -- Tendon -- Irregular Dense Collagenous Tissues -- Dense Elastic Tissue -- Cartilage -- Bone -- Notochord -- E. Muscle -- Smooth Muscle -- Striated or Skeletal Muscle -- Electric Organs -- Cardiac Muscle -- Conducting System of the Heart -- F. Nervous Tissue -- The Neuron -- Perikaryon -- Nerve Cell Processes or Fibers -- Cell Shape -- Nerve Endings -- Nonnervous Components of Nervous Tissue -- Neurilemma and Satellite Cells -- Neuroglia -- Ependymal Cells -- Meninges -- Choroid Plexuses -- G. Blood and Lymph -- Blood -- Erythrocytes -- Leukocytes -- Granulocytes -- Agranulocytes -- Blood Platelets -- Lymph -- Hemopoiesis -- Pluripotent Stem Cell -- Nomenclature -- General Considerations -- Erythrocytic Series: Erythropoiesis -- Granulocytic Series: Granulopoiesis -- Megakaryocyte or Giant Cell -- Monocytic Series -- Hemopoiesis in Lymphoid Tissue -- Stem Cell -- Lymphocytic Series -- Plasmocytic Series -- III. Organs and Organ Systems -- H. The Circulatory System -- Fundamental Plan of the Vascular System -- Arteries -- The Microcirculation -- Arterioles -- Capillaries -- Sinusoids -- Rete Mirabile -- Cavernous Bodies -- Venules -- Veins -- Comparisons -- The Heart -- Lymph Vessels -- I. Hemopoietic Organs -- Hemopoietic Organs in the Lower Vertebrates -- Hemopoietic Organs of Higher Vertebrates -- Lymphoid Organs of Higher Vertebrates -- Tonsils -- Appendix -- Lymph Nodes -- Spleen -- Hemal Nodes -- Thymus -- Cloacal Bursa (Bursa of Fabricius) -- Myeloid Organs: The Bone Marrow -- J. Integument -- Skin -- Scales -- Hair -- Feathers -- Other Integumentary Glands -- Glands of Nonmammals. , Glands of Mammals -- Digital Tips -- Horns and Antlers -- K. The Digestive System -- General Arrangement of the Digestive Tube -- Glands -- Nerve Supply -- Vascularization -- Oral Cavity -- Tongue -- Tonsils -- Adaptations of Tongues -- Teeth -- Epidermal Teeth -- True Teeth -- Esophagus -- Junction of Stomach and Esophagus -- Stomach -- Gastroduodenal Junction -- Small Intestine -- Other Layers -- Comparative Histology of the Small Intestine -- Ileocecal Valve -- Large Intestine -- Colon -- Rectum -- Cecum -- Vermiform Appendix -- Comparative Histology of the Large Intestine -- Glands Associated With the Digestive Tract -- Salivary Glands -- Parotid Gland -- Submaxillary Gland -- Sublingual Gland -- Comparative Histology of the Salivary Glands -- Pancreas -- Comparative Histology of the Pancreas -- Liver -- Comparative Histology of the Liver -- Gall Bladder -- L. Respiratory Systems -- Water Breathing -- Air Breathing -- Vomeronasal Organ -- Lungs and Air Ducts -- Trachea -- Bronchi -- Saccular Lungs -- Bird Lungs -- Swim Bladder -- M. Excretory Systems -- Evolution of the Kidney -- Pronephros or Head Kidney -- Opisthonephros -- Metanephros -- Ultrastructural Aspects of Urine Production -- Renal Corpuscle -- The Tubular Nephron -- Comparative Histology of the Metanephros -- Juxtaglomerular Complex and the Control of Blood Pressure -- Ureter of Amniotes -- Urinary Bladder -- Mammalian Urethra -- Extrarenal Excretion of Salt -- Rectal Gland -- Salt Glands -- N. Endocrine Organs -- Pituitary Gland or Hypophysis -- Pars Distalis (Anterior Lobe) -- Pars Tuberalis -- Pars Intermedia -- Pars Nervosa (Posterior Lobe) -- Blood Supply -- Ultrastructure -- Pituitary Gland of Other Vertebrates -- The Caudal Neurosecretory System and Urophysis of Fishes -- Pineal Body or Epiphysis Cerebri -- Thyroid Gland -- Parathyroid Glands -- Ultimobranchial Bodies. , Adrenal Glands -- O. Genital Systems -- Female -- Frog Ovary -- Ovary of Other Vertebrates -- Mammalian Ovary -- Oviduct -- Uterus -- Vagina -- Sexual Cycles in Female Mammals -- Male -- Mammalian Testis -- Testes of Other Vertebrate -- Male Genital Ducts -- Intromittent Organs -- P. Sense Organs -- Eye -- Tunica Fibrosa -- Tunica Vasculosa (Uvea) -- Lens -- Retina -- Supplemental Retinal Circulation -- Development of the Eye -- Comparative Histology of the Eye -- Supplemental Nutritive Devices -- Responses to Variability of Ambient Light -- Accessory Structures of the Eye -- Eyelids -- Harderian and Lachrimal Glands -- Lateral Line Organs -- Ear -- Image and Diagram Acknowledgments -- Index -- Back Cover.
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  • 2
    Online Resource
    Online Resource
    Dordrecht :Springer Netherlands,
    Keywords: Fishes -- Generative organs. ; Electronic books.
    Description / Table of Contents: This volume describes the myriad ways in which fish have approached problems of reproduction. It is an amply illustrated comparative study of the microscopic structure of the female genital systems of fish.
    Type of Medium: Online Resource
    Pages: 1 online resource (603 pages)
    Edition: 1st ed.
    ISBN: 9781402057151
    DDC: 597
    Language: English
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  • 3
    ISSN: 0362-2525
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: The brook stickleback, Culaea inconstans (Kirtland), in common with other bony fishes, lacks a germinal epithelium in the tubules of the testis, and the tubule wall is composed of a thin, discontinuous layer of myoid cells and collagenous fibers. Labelling of germ cells with tritiated thymidine has shown that the germ cells are derived from clumps of spermatogonia in the interstitial area. Large companion cells within the lumina of the tubules extend their processes to engulf spermatogonia from the interstitium which then enter the lumen of the tubule. Subsequent development of the germ cells takes place within individual compartments formed by folds of the plasma membrane of a companion cell. The companion cell, together with its complement of germ cells, constitutes a cyst. A companion cell may surround spermatogonia in the interstitium and at the same time encompass residual sperm of the previous season within the lumen. The plasma membranes of the germ cells and the companion cells remain discrete. Mature sperm are released into the lumen of the tubule and the companion cell again extends its processes into the interstitium and engulfs more spermatogonia for the following year.Companion cells may be homologous to the Sertoli cells of higher vertebrates although their processes penetrate the interstitium during the initial stages of spermatogenesis and they do not contain a permanent stock of spermatogonia.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    New York, NY : Wiley-Blackwell
    Journal of Morphology 130 (1970), S. 187-206 
    ISSN: 0362-2525
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: A histological study of the spleen of the Brown-headed cowbird, Molothrus ater, is presented.One of the most striking differences from the mammalian spleen is the lack of trabeculae and of smooth muscle in the capsule which would suggest that the spleen is not an organ of storage or pumping of blood. Without trabeculae to foster the close association of the major arteries and veins, these vessels take separate courses. Their support is provided by elaboration of the collagenous and reticular fibres of the stroma.A peculiar ovoid structure, the ampulla, carries the blood from the terminal arterioles of the white pulp to both the sinusoids and the reticular cords of the red pulp so that both open and closed circulations are seen but the open circulation predominates. The ampulla has perforated walls consisting of a simple cuboidal endothelium surrounded by a dense reticular sleeve. Leucocytes were seen passing through the holes in the walls of the ampullae by diapedesis. It is suggested that the ampullae may be contractile and act as sphincters controlling the flow of blood through the spleen.The major functions of the spleen appear to be haemopoiesis, production of antibodies, and filtration of blood.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 0362-2525
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: The cyclic changes in the testis of the five-spined stickleback Eucalia inconstans (Kirtland) were studied histologically. Specimens were trapped between July 1965 and July 1967 in a shallow pond near London, Ontario.A three-dimensional microscopic study showed a main vas deferens and a system of primary, secondary and tertiary tubules.The testis cycle was divided into seven arbitrary stages. Spawning takes place from mid-April to mid-July. This is followed by the division of primary spermatogonia which are located along the walls of the tubules, producing cysts of spermatogonia enclosed in connective tissue which is surrounded by a thin epithelium. Both primary and secondary spermatocytes develop within these cysts. Breakdown of the cysts occurs with the development of spermatids and spermiogenesis occurs while spermatids are free in the tubules. Over-wintering of mature sperm takes place. Development of mature sperm from primary spermatogonia takes about 156 days.Germinal epithelium is absent but primary germ cells are believed to be those cells occupying the spaces between the tubules of the testis. No tissue which might be implicated in hormone production was observed.Phagocytic invasion of the testis has been studied. Massive infiltration by phagocytes is believed to be responsible for the sudden increase in testis weight observed during spawning. These cells ingest sperm nuclei and groups of them have been observed in the lumen of the tubules and the vas deferens, probably on their way out of the body.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
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  • 6
    ISSN: 0362-2525
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: Cell surface coats are important in adhesion and other cellular activities. The lamprey egg possesses a surface coat that has been divided into two morphologically and functionally distinct regions. The amorphous apical tuft forms a cap over the animal pole, while the elaborately-textured adhesive coat covers the ventral two-thirds of the egg. This latter area is composed of saccules that form rosettes over the egg surface and is derived from the remains of specialized follicular cells which break down during ovulation. The adhesive qualities of these coats may be inhibited or abolished by various proteins and sulphydryl-blocking agents, thereby implicating, as a possible source of this adhesion, classes of acid and sulphated glycoproteins and glycosaminoglycans which occur on the egg surface.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    New York, NY : Wiley-Blackwell
    Journal of Morphology 179 (1984), S. 175-195 
    ISSN: 0362-2525
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: A histological investigation of the filtering function of the spleen of the sunfish Lepomis spp. was conducted by light, scanning, and transmission electron microscopy. The parenchyma of the organ is predominantly red pulp, a system of splenic cords and sinuses. The white pulp consists of loose lymphoid tissue which forms a cuff around the pulp arteries. Filtering of particulate matter from the blood occurs in the red pulp by phagocytes of the pulp cords and ellipsoids (periarterial macrophage sheaths). The ellipsoids are pale-staining cuffs of macrophages and reticular cells in a framework of reticular fibres surrounding the arterial capillaries. Destruction of effete blood cells (especially erythrocytes) is confined to the pigment nodules; particulate matter is not taken up by the nodules. These yellow-brown bodies are dispersed throughout the red pulp and are bounded by a reticular capsule. They contain masses of phagocytes and have the appearance of a morula. They are associated with blood vessels and are surrounded by sinusoids. Prussian Blue stain shows the presence of haemosiderin within their phagocytes. The phagocytes of the pigment nodules are filled with inclusions such as residual bodies, siderosomes, and fragments of erythrocytes. The early filtering of particulate matter by the phagocytes of the pulp cords and ellipsoids may allow for a more efficient phagocytosis of erythrocytes by the pigment nodules, followed by storage and reutilization of iron-containing compounds uncontaminated by other phagocytosed material.
    Additional Material: 30 Ill.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    New York, NY : Wiley-Blackwell
    Journal of Morphology 190 (1986), S. 9-26 
    ISSN: 0362-2525
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: The head kidney and spleen are major sites of haemopoiesis in fish; a secondary center is found in loose connective tissue of the intestine. In this study we determined the nature of gut-associated haemopoietic tissue in the goldfish, Carassius auratus, using light and electron microscopy. This tissue is a loose stroma of reticular cells and fibers vascularized by capillaries, venules, and arterioles. The cellular population includes lymphoblasts, small and medium-sized lymphocytes, plasmocytes, macrophages, and various granulocytes. The most abundant granulocyte is the mast cell, whose large granules stain with Alcian blue and toluidine blue. Heterophils are found in the intestinal connective tissue as well as two other granulocytes: one with ovoid granules having dense parallel lamellae and another with granules containing crystalline inclusions. Immature forms of both granulocytes were also noted. Macrophages containing phagocytosed debris were often located close to the epithelium; they were observed forming clusters with lymphocytes. The epithelium contained a number of migrating leucocytes including lymphocytes and lymphoblasts, macrophages, and heterophils. Although many granulocytes were found in the connective tissue, granulopoiesis does not seem to be a major function. Gut-associated haemopoietic tissue in goldfish resembles diffuse lymphoid tissue and may be involved in intestinal immune responses.
    Additional Material: 24 Ill.
    Type of Medium: Electronic Resource
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  • 9
    ISSN: 1432-0878
    Keywords: Cell junctions ; Kidney ; Snake ; Reptile ; Freeze ; fracture
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Zonulae occludentes are shown by freeze-fracture to be pleomorphic along the garter snake nephron. In the neck and proximal segments the occluding junctions are moderately complex with frequent discontinuities in their junctional fibrils. Junctional depth and complexity are maximal in the distal and collecting segments and discontinuities in fibrils are absent. Comparison of these results with similar observations on other tissues indicates that the zonulae occludentes in the neck and proximal segments are “intermediate” to “leaky” and that they may be “very tight” in the distal and collecting segments. These findings suggest that in the garter snake nephron transepithelial flow of fluid may occur primarily by passive diffusion through the zonulae occludentes in the neck and proximal segments and by cell-mediated osmotic flow in the distal and collecting segments. Gap junctions occur only in the proximal tubule and are probably involved in low resistance, intercellular movement of ions.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    New York, NY [u.a.] : Wiley-Blackwell
    The @Anatomical Record 170 (1971), S. 401-411 
    ISSN: 0003-276X
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Medicine
    Notes: The opisthonephric kidneys of both larval and adult Petromyzon marinus lack a renal portal system. The tubules are supplied with arterial blood from the glomus through a system of efferent arterioles, capillaries, and sinusoids with the latter draining into the venous system. The adult kidney possesses a more complex and larger system of sinusoids than ammocoetes and these sinusoids reach the venous system through large subcapsular sinuses. Paralleling of tubules with sinusoids and arterioles in the ventral portion of the adult kidney resembles the association of the vasa recta with the tubules of the renal medulla in the mammalian kidney. This may suggest a mechanism important to tubular transport in adult lampreys. The intertubular tissue of ammocoetes is infiltrated with haemopoietic tissue while large numbers of phagocytes within the adult sinusoids may be involved in the destruction of blood cells.
    Additional Material: 2 Ill.
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