Unit 3: Table 4-1 Types of Epithelial Tissue
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6 terms
Terms | Definitions |
|---|---|
 Simple squamous | Structure: One layer of flat cells Location/Function • Alveoli of the lungs- thin to permit diffusion of gases • Capillaries- thin to permit exchanges of materials; smooth to prevent abnormal blood clotting |
| Stratified squamous | Structure- Many layers of cells; surface cells are flat; lower layer undergoes mitosis Location/Function •Epidermis-surface cells are dead; a barrier to pathogens •Lining of esophagus and vagina- surface cells are living; a barrier to pathogens |
| Transitional | Structure- Many layers of cell; surface cells change from rounded to flat Location/Function •Lining of urinary bladder-permits expansion without tearing the lining |
| Simple Cuboidal | Structure- One layer of cube-shaped cells Location/Function •Thyroid gland-secretes thyroxine •Salivary glands-secretes saliva •Kidney tubules-permit reabsorption of useful materials back to the blood |
| Simple Columnar | Structure-One layer of column-shaped cells Location/Function • Stomach lining-secretes gastric juices • Line of small intestines-secretes enzymes and absorbs end products of digestion (microvilli present) *Goblet cell: secrete mucus and are found in the lining of the intestines and part of the respiratory tract such as trachea. |
| Ciliated | Structure-One layer of columnar cells with cilia on their free surfaces Location/Function *Lines the nasal cavities, larynx, trachea, and lg. bronchial tubes •Lining of trachea-sweeps mucus and dust to pharynx •Lining of fallopian tubes-sweeps ovum toward uterus |
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