3.1.2 Animal transport – Types of Circulatory System

Question 1

State 3 factors that influence the need for a transport system?

Answer 1

1) Size
2) Surface area to volume ratio
3) Level of metabolic activity

Question 2

Where does blood flow in an open circulatory system?

Answer 2

Blood circulates through a body cavity and bathes cells and tissues directly.

Question 3

Give an example of an organism that has an open circulation.

Answer 3

An insect.

Question 4

Where does blood flows in a closed circulatory system?

Answer 4

Blood circulates the body within vessels.

Question 5

Give 2 examples of organisms that have a closed circulatory system.

Answer 5

Mammals, birds, reptiles, amphibians and fish.

Question 6

What does it mean to have a double circulatory system?

Answer 6

• Blood travels through the heart twice in one circuit of the body.
• The 2 circulations are known as ‘pulmonary’ (the lungs) and ‘systemic’ (the rest of the body).

Question 7

Give an example of an organism that has a double circulatory system.

Answer 7

Mammal, bird, reptile, amphibian

Question 8

What does it mean to have a single circulatory system?

Answer 8

Blood flows through the heart once in one circuit of the body.

Question 9

Give an example of an organism that has a single circulatory system.

Answer 9

Fish

Question 10

Why is a double circulatory system important in larger, more active animals such as mammals?

Answer 10

The blood is delivered to the rest of the body at a higher pressure, so more oxygen is delivered to cells for respiration.