Wk12 REMEMBER

Question 0

Epithelial tissue (epithelium)
Main functions:
- covering body surfaces; and
- lining body cavities and tubes

Answer 0

Connective tissue (CT)
Main functions:
- binding and supporting other tissues
- protecting other tissues
- insulating other tissues
- storing energy reserves (fuel)
- transporting substances within the body

Question 1

What are the 4 main tissue types?

Answer 1

Epithelial tissue
Connective tissue
Neural tissue
Muscle tissue

Question 2

Neural tissue
Main function:
- carries electrochemical signals from one part of the body to another,
I.e internal communication

Answer 2

Muscle tissue
Main function:
- contracts to cause movement
- three categories 
1. Skeletal muscle
2. Heart muscle
3. Smooth muscle in the walls of hollow organs

Question 3

Classes of epithelia
Based on cells and layers:
Simple - one layer
Stratified - several layers, two or more

Squamous - wide/thin, squash, suit ed to diffusion
Cuboidal - cubes with round corners, as tall as is wide
Columnar - rectangle shape, taller then wide

Answer 3

Simple squamous epithelium
Found: abdominal cavities, lining of lungs (good for diffusion), inside of blood vessels

Stratified squamous epithelium
Found: surface of skin, lining of mouth, throat, rectum, anus, vagina
- Wear and tear areas
- ,any layers,wipe a few off before reaching blood
Function: protection

Question 4

Simple cuboidal epithelium
Found: glands; ducts, portions of kidney, found in places of secrete or absorb
Function: limited protection

Stratified cuboidal epithelium
Found: lining of some ducts, mammary glands
Function: protection, secretion, absorption

Transitional epithelium
Found: urinary tract, renal pelvis, ureters
Function: permits eansion & recoil after stretching

Answer 4

Simple columnar epithelium
Found: small and large intestines, lining of stomach
Function: protection, secretion, absorption

Question 5

Characteristics of epithelia

1. Avascularity
2. Regeneration
3. Polarity (apical and basal surfaces)
4. Attachment (basal lamina)

Answer 5

Functions of epithelial tissue

1. Provide physical protection
2. Control permeability
3. Provide sensation
4. Produce specialised secretions (glandular epithelium)