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Tissue- a cellular organizational level intermediate between cells and a complete
organism.
Epithelium- a tissue composed of cells that line the cavities and surfaces of structures
throughout the body.
Apical surface- one free unattached surface or edge.
Basement membrane- a thin sheet of fibers that underlies the epithelium, which lines the
cavities and surfaces of organs, or the endothelium, which lines the interior surface of
blood vessels.
Simple epithelium- only one cell layer thick
Stratified epithelium- many cells in thickness
Simple squamous epithelium- an epithelium characterised by its most superficial layer
consisting of flat, scale-like cells called squamous cell.
Serous membranes- a smooth membrane consisting of a thin layer of cells which excrete
serous fluid.
Simple cuboidal epithelium- one layer of cuboidal cells resting on a basement membrane,
common in glands and their ducts.
Goblet cell- Any of the specialized epithelial cells found in the mucous membrane of the
stomach, intestines, and respiratory passages that secrete mucus.
Mucous membranes- linings of mostly endodermal origin, covered in epithelium, which
are involved in absorption and secretion
Pseudostratified columnar epithelium-
Stratified squamous epithelium- (flattened) epithelial cells arranged in layers upon a
basement membrane.
Stratified cuboidal epithelium- epithelial tissue composed of cuboidally shaped cells
arranged in multiple layers.
Stratified columnar epithelium- found in the excretory ducts of the mammary gland and
the main excretory duct of the large salivary glands.
Transitional epithelium- a type of tissue consisting of multiple layers of epithelial cells
which can contract and expand
Gland- one or more cells that make and secrete a particular product.
Secretion- an active process in which glandular cells obtain needed materials from the
blood and use them to make their secretion.
Endocrine gland- lose their connection to the surface.
Exocrine gland- directly connected to the epithelial apical surface via a pore
Body membranes- cover surfaces, line body cavities, form protective sheets around
organs.
Epithelial membranes- aka covering and lining membranes, they are actually simple
organs.
Cutaneous membrane- the skin, composed of dermal and epidermal layers.
Mucous membrane- membrane that forms the linings of body cavities open to the
exterior.