Week 2 (epithelial cells) Flashcards
what are the four primary tissue classes
- Epithelial
- Muscle
- Nervous
-Connective
Identify the diagram
What are the two layers of epithelium
- Basal lamina (in red) (made by epithelial cells)
- Reticular lamina (yellow) (secreted by connective tissue cells)
Classified by arrangement of cells into layers (draw and define)
1) Simple: One cell thick
2) Stratified: Multi cell layers thick
3) Pseudo-stratified: single layer of cells (nuclei found at different levels)
Identify
Classified by shape of surface cells
1) squamous = flat
2) cuboidal = cube-shaped
3) columnar = tall column
4) transitional = shape varies with tissue stretching
Microvilli
Microvilli: Increase the surface area for re-absorption (rigid)
Cilia
Cilia: Aids the movement of fluids (non-rigid)
Simple squamous cells (location and function)
Location: The lungs, lining of the heart, blood vessels, lymphatic vessels
Function: semi-permeable, secretes lubricating substance
Simple cubodial
Location: Ducts, secretory portions of glands in kidneys
Fucntion: absorbs, secretes muscus and enzymes
Simple colmunar
Location
1) ciliated: bronchi, uterine tubes, uterus
2) Smooth: digestive tract, bladder
Function: secretes muscus; cilia moves mucus
pseudostratified columnar
Location: lining of the trachea, upper respiratory tract
Function: Secretes mucus; cilia move mucus
Stratified squamous
Location: lining of esophagu, mouth, vagina
Function: Protection from abrasion