1. Advanced Biology
Chapter 4 – Tissues
Pgs

2. Tissues Group of cells that perform a common or related function
Epithelial
Connective
Muscle
Nervous
Study of Tissues

3. Covers body surface or lines a body cavity
Tissues
Covers body surface or lines a body cavity
Skin, CV, Dig, Resp – Glands of body

4. 6 roles as an interface tissue
Protection
Absorption
Filtration
Excretion
Secretion
Sensory Reception

5. Special Characteristics
Close packed cells
Form continuous sheets, bound by tight junctions and desmosomes

6. Special Characteristics
Cells both surfaces
Smooth, slick; free surface exposed to body exterior or cavity of internal organ
Fingerlike extensions – increase surface area (line intestines or kidney) (look fuzzy – brushborder)

7. Thin supporting sheet, selective filter, is scaffolding for repair
Hairlike extensions – propel things (line trachea)
Bottom
Thin supporting sheet, selective filter, is scaffolding for repair

8. Special Characteristics
All epithelial sheets rest upon CT
Deep to basal lamina – fine network of collagen fibers
Basal + Reticular – reinforces

9. Special Characteristics
Has nerves but no blood vessels

10. Special Characteristics
High Regeneration Capability – if damaged, can grow back

11. Classification of Epithelia
Single Cell Layer – absorption and filtration
Multicellular – stacked; protection

12. Flat/Scalelike
Cubelike (box), tall as wide
Tall, column shaped – nucleus conforms to shape

13. Four Major Classes of Simple Epithelia
Simple Squamous
Simple Cuboidal
Simple Columnar
Pseudostratified Columnar

14. Four Major Classes of Stratified Epithelia
Stratified Squamous
Statified Cuboidal
Stratified Columnar
Transitional

15. Assignment
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