Circulatory System

Question 1

What does a human circulatory system consist of?

(2 points)

Answer 1

The heart and blood vessels

Question 2

What kind of circulatory system does humans have?

Answer 2

Double circulatory system

Question 3

What is a double circulatory system?

Answer 3

One loop through the heart and lungs (pulmonary) & one through the heart and the body (systemic)

Question 4

Why is a transport system needed in humans?

Answer 4

Due to the low surface area to volume ratio

Question 5

The blood leaves the heart under ___(1)___ and flows along ___(2)___ and then ___(3)___ (small arteries) to ___(4)___ .

(4 points)

Answer 5

1. Preassure
2. Arteries
3. Arterioles
4. Capillaries

Question 6

What occurs in capillaries?

Answer 6

Come into close contact with most cells in the body where most substances are exchanged

Question 7

After passing along capillaries, the blood returns to the heart by means of ___(1)___ (small veins) and then ___(2)___.

Answer 7

1. Venules
2. Veins

Question 8

Which blood vessel has valves?

Answer 8

Veins

Question 9

What do valves do?

Answer 9

Ensures that blood flows only in one direction, prevents backflow

Question 10

What do arteries do?

Answer 10

Carry oxygenated blood away from the heart at high pressure.