Epithelial tissues

Question 1

epithelium

Answer 1

Tissue that:
(1) covers or lines surfaces and cavities of the
body
or
(2) forms glands (= secretory structures).

Question 2

Function of epithelial cells

Answer 2

• Absorption and Secretion
• Diffusion and Filtration
• Sensory reception
remember it’s dependant on cell function ( classification )

Question 3

Classification

Answer 3

• By layering: simple vs. stratified

* By shape: squamous vs. cuboidal vs. columnar

Question 4

Simple epithelium

Answer 4

Simple squamous,
Simple cuboidal,
Simple columnar

Question 5

Simple squamous

Answer 5

Inner lining of air sacs in lungs (alveoli)
Endothelium: Inner lining of heart & blood vessels
Also lining of closed body cavities
Glomerular capsule in kidney (where filtration occurs)
No surface projections (cilia, microvilli)

Question 6

Simple cuboidal

Answer 6

Glands:
Salivary glands
Also pancreas, lining of ovary
Kidney tubules


Question 7

Simple columnar

Answer 7

Nonciliated: Lines most of digestive tract
Columnar shape provides absorption
Ciliated: Lines small bronchi (air tubes in lungs)
- Sweeps away debris