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Ch. 4 Tissues


A group of cells and cell products that perform a limited range of specific functions Tissues
Study of Tissues Histology
4 basic tissue types Epithelial, Connective, Muscle, & Nerve
Covering Epithelial
Support Connective
Movement Muscle
Information Transfer Nerve
A sheet of cells that covers a body surface or lines a body cavity Epithelial Tissue
Provides physical protection Epithelials Fuctions as a Covering
Controls permeability of body Epithelials Fuctions as a Covering
Produces specialized secretions Epithelials Fuctions as a Covering
Enhances sensory reception Epithelials Fuctions as a Covering
General characteristics of Epithelial Tissue Polarity, Cellularity, Innervated, Avascular, & High regeneration capacity.
Apical & Basal surfaces Polarity
Exposed to the body exterior or the cavity of an internal organ Apical Surface
Connects to underlying tissue. Supported by a basement membrane composed of two parts. Basal Surface
Two parts of the Basal surface Basal & Reticular Lamina
Glycoproteins secreted by the epithelial cells Basal Lamina
Network of collagen fibers produced by underlying connective tissue Reticular Lamina
Composed of closely packed cells Cellularity of Epithelial
Supplied by nerve fibers Innervated of Epithelial
No blood vessals present Avascular
Increase cell surface area for absorption and secretion Microvilli
Move substances along surface of cell Cilia
Keeps cells from being ripped apart Desmosomes
Filtration, Gas Exchange, and Friction-reduction Simple Squamous Epithelial
Lines blood/lymph vessels, lines ventral body cavity, lungs, kidneys Simple Squamous Epithelial
Secretion & Absorbtion Simple Cuboidal Epithelial
Kidneys, and small ducts of glands Simple Cuboidal Epithelial
Secretion, Absorbtion, & Protection Simple Columnar Epithelial
Digestive tract, Uterine tubes/ parts of uterus Simple Columnar Epithelial
Microvilli, goblet cells, and cilia Simple Columnar Epithelial
Created by: ky13



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