Blood Vessels

Question 1

What are the key structural features of arteries?

Answer 1

1. thick
2. muscular
3. elastic walls
4. narrower than veins
5. do not contain valves.

Question 2

What is the function of arteries?

Answer 2

1. withstand high blood pressure
2. propel blood forward
3. carry blood away from the heart.

Question 3

What are the structural characteristics of capillaries?

Answer 3

1. 1 cell thick walls
2. highly branched
3. have a very narrow diameter.

Question 4

What are 2 functions of capillaries?

Answer 4

1. allow for easy and fast exchange of materials with tissue cells
2. provide slow blood flow for diffusion.

Question 5

How are veins different than arteries?

Answer 5

1. Veins have the largest internal diameter.
2. Veins less elastic and muscular than arteries
3. Veinw contain valves.

Question 6

What is the function of veins?

Answer 6

1. carry blood back to the heart,
2. prevent backflow of blood

Question 7

5 types of blood vessels

Answer 7

1. Arteries
2. arterolies
3. capilliries
4. venules
5. veins

Question 8

Explain varicose veins

Answer 8

Valves streched, blood pools

Question 9

Causes of varicose veins

Answer 9

1. obseity, age, pregnancy, standing

Question 10

Hemorrhoids are what?

Answer 10

Anal varicose veins