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Ch. 4 Tissues
Physiology
| Question | Answer |
|---|---|
| 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 |