The Heart And Blood Vessels

Question 1

What is an open circulatory system?

Answer 1

An open circulatory system means blood leaves blood vessels and flows around the cells of the animal’s body before re-entering blood vessels again

Question 2

What is a closed circulatory system?

Answer 2

A closed circulatory system means blood remains in a continuous system of blood vessels

Question 3

What is blood pressure?

Answer 3

Blood pressure is the force the blood exerts against the wall of a blood vessel

Question 4

What are valves?

Answer 4

Valves control the direction of blood flow

Question 5

What is a portal system?

Answer 5

A portal system is a blood pathway that begins and end in capillaries

Question 6

What is meant by diastole?

Answer 6

Diastole is when the heart chambers relax

Question 7

What is meant by systole?

Answer 7

Systole is when the heart chambers contract

Question 8

What is a pulse?

Answer 8

A pulse is the alternate expansion and contraction of the arteries

Question 9

What is blood pressure?

Answer 9

Blood pressure is the force exerted by the blood against the wall of the blood vessels (mainly the arteries)