The Cardiovascular & Respiratory System Practice Questions

Name blood vessel A, which brings blood from the body into the right atrium.

Blood leaves the heart through vessel B. Name the organ this blood travels to.

The muscular wall of chamber D is much thicker than the wall of the right ventricle.

Explain why.

Complete Table 1 by writing in the three missing answers.

Component of blood	Function
Plasma	(i)
Red blood cells	(ii)
(iii)	Help the blood to clot at a wound
White blood cells	Help to protect the body against pathogens

Blood is described as a tissue. Suggest why.

The boxes below show three structures in the breathing system.

alveoli	bronchi	trachea

Write the three structures in the order that air passes through them when breathing in.

Name the network of tiny blood vessels that surrounds each alveolus.

Name the gas that diffuses from the air in the alveoli into the blood.

Use Table 1 to identify each type of blood vessel.

Write artery, vein or capillary next to each letter.

Vessel R contains valves along its length. Vessel P does not.

Use the data in Table 1 to explain why.

Name the chamber of the heart in which these pacemaker cells are found.

Describe how these cells control the resting heart rate.

A patient's heart beats in an irregular way. A doctor fits the patient with an artificial pacemaker.

Explain how the artificial pacemaker helps this patient.

Calculate the volume of blood pumped out of her left ventricle in one minute.

Give your answer in $\text{cm}^3$ per minute.

$20\%$ of the blood leaving her left ventricle flows to her kidneys.

Calculate the volume of blood that flows through her kidneys in one hour.

Give your answer in $\text{dm}^3$.

$1\ \text{dm}^3 = 1000\ \text{cm}^3$

Which letter, A, B or C, shows a white blood cell?

Give one reason for your answer, using Figure 2.

Component A is adapted to transport oxygen around the body.

Explain two adaptations of component A for this function.

Explain what is meant by a double circulatory system.

Explain one advantage of having a double circulatory system rather than a single circulatory system.

Figure 3 shows cross-sections through the three types of blood vessel found in the human body. The vessels are not drawn to the same scale.

Explain how the structure of each of these three blood vessels is related to its function.

Use Table 2 to calculate the total volume of blood pumped out of the man's left ventricle in one minute.

Calculate the percentage of the blood leaving the left ventricle that flows to the kidneys.

The man's heart rate at rest is $65$ beats per minute.

Calculate the volume of blood pumped out of his left ventricle in one beat.

Give your answer in $\text{cm}^3$ to 1 decimal place.

Table 2 shows that blood flows to the heart muscle even though the heart chambers are already full of blood.

Name the blood vessels that supply the heart muscle and give the reason why this blood supply is needed.