Chapter 4: Epithelial Tissue Flashcards
1
Q
2 Varieties Of Epithelial Tissues
A
- glandular tissue- perform secretion
2. covering + lining tissues- directly contact external environment
2
Q
Glandular Tissue
A
perform secretion
3
Q
Covering + Lining Tissues
A
directly contact external environment
ex: skin (epidermis)
4
Q
Epithelial Characteristics
A
- consist of large #’s of closely packed cells = good barriers
- possess basement membranes
- tend to possess apical surface specialization
- avascular (no blood vessels)
- innervated (connective to nervous system; send + receive messages from nervous system)
- regenerate easily
5
Q
Layer: Simple
A
one layer of cells
6
Q
Layer: Stratified
A
2+ layers of cells (many layers)
7
Q
Shape: Squamous
A
flat
8
Q
Shape: Cuboidal
A
cubed; not tall nor wide(flat)
9
Q
Shape: Columnar
A
tall
10
Q
Simple Squamous Epithelium
A
one layer of flat cells
- found in places where ease of passage across epithelium is very important
ex: found lining lungs
11
Q
Simple Cuboidal Epithelium
A
one layer of cubed cells (not so much tall or wide(flat) -performs secretion + absorption ex: kidney tubule- site of urine formation -secrete waste into urine -absorb water from urine
12
Q
Simple Columnar Epithelium
A
one layer of tall cells
- performs secretion + absorption
- found in small intestine
13
Q
Pseudostratified Ciliated Columnar Epithelium
A
falsely layered of tall cells
- function- protection
- location- Trachea (windpipe)
14
Q
Stratified Squamous
A
many layers of flat cells
- most common epithelium
- function- protection (friction, abrasion)
- location- outer layer of skin; epidermis, esophagus(tube leads from throat to stomach)
15
Q
Stratified Cuboidal
A
many layers of cubed cells
- function- protection, some secretion
- location- ducts of sweat glands
