anantomy study guide exam 2

Anantomy study - Tissues Epithelial tissue o Locations Body coverings Body linings Glandular tissue o Functions Protection Absorption Filtration

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Tissues: - Epithelial tissue o Locations: Body coverings Body linings Glandular tissue o Functions Protection Absorption Filtration Secretion o Two main types: Coverings and lining epithelia on external and internal surfaces Glandular epithelia: secretory tissue in glands o Cells have apical and basal surfaces o Tissues are composed of closely packed cells and are supported by a connective tissue called the reticular lamina o Avascular o Regenerate easily if well nourished o Classification: Number of cell layers Shape of cells o Simple squamous epithelium: Single layer of flat cells Forms membranes, allows passage of materials by diffusion Lines body cavities such as the ventral body cavity, and is found in the air sacs of lungs o Simple cuboidal epithelium Single layer of cube-like cells Secretion
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Ducts of small glands, covers the ovary’s surface o Simple columnar epithelium Single layer of tall column-like cells Absorption Lines the digestive tract o Psuedostratified columnar epithelium Single layer of cells of differing heights: looks like there is more than one layer but there really isn’t Secretion; Found in the respiratory tract because it is ciliated; trachea o Stratified squamous epithelium Thick membrane composed of several cell layers; cells at the apical surface are flattened Protection where friction is common Skin - epidermis o Stratified cuboidal and stratified columnar epithelium Cuboidal: two layers of cuboidal cells Columnar: surface cells are columnar, the cells underneath vary in size and shape Both are rare in the human body Found in ducts of large glands o Transitional epithelium Shape of cells depends upon the amount of stretching Lines the organs of the urinary system Stretches; found in the bladder o Membranes: sheets of tissue that cover or line surfaces or separate organs or parts of organs from each other, provide specialized secretions Epithelial: Cutaneous membrane: the skin o Stratified squamous epithelium and has an underlying layer of connective tissue
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o Thick, relatively water proof, and dry Mucous membranes o Line body cavities that are open to the exterior like the digestive and respiratory tracts o Connective tissue portion is called the lamina propria Serous membranes o Lined the sealed internal cavities of the body o Consist of a simple epithelium supported by loose connective tissue o Example is the pleura o Has parietal and visceral parts: Parietal: line internal body walls Visceral: cover internal organs o Glandular epithelium Gland: one or more cells that makes and secretes an aqueous fluid Endocrine: Ductless; secretions diffuse into blood vessels and all secretions are hormones Well vascularized Exocrine: Secretion empty through ducts to the epithelial surface Include mucous, sweat, oil glands, digestive secretions Modes of secretion:
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This note was uploaded on 12/01/2010 for the course CCJS 100 taught by Professor Gaston during the Fall '07 term at Maryland.

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Anantomy study - Tissues Epithelial tissue o Locations Body coverings Body linings Glandular tissue o Functions Protection Absorption Filtration

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