Practice- Circulatory System

A woman is running in a race. Which of the following statements are true about the woman as she runs?

A. Her blood circulates at a higher rate.

B. Her body produces less carbon dioxide.

C. Her heart beats faster.

D. Her body needs more oxygen.

• A and D only

• B and C only

• A, C and D only

• B, C and D only

Which of the following about X are likely to be true?

A. It connects Y and Z.

B. It transports waste materials to all parts of the body.

C. It is a smaller blood vessel than Y and Z.

• A and B only

• A and C only

• B and C only

• A, B and C only

Ana measured her heart rate when she was resting.

It was 80 beats per minute. Immediately after carrying out an activity,

she measured her heart rate again. It was 125 beats per minute.

Which of the following activities did Ana carry out?

• Switching on the stove

• Folding a paper boat

• Playing badminton with her brother

• Sketching a picture

Conrad swam a few laps. Which of the following organ systems worked together so that she had the energy

to carry out the activity?

A. Respiratory system

B. Muscular system

C. Digestive system

D. Circulatory system

• A and B only

• C and D only

• A, B and C only

• A, C and D only

Devlin cycled a distance of 10 km. Which of the following graphs correctly shows his heart rate over time

as he cycled?

• 
• 
• 
• 

Based on the information in the table, match P, Q, R and S with their corresponding activities

below.

• Jogging

• Activity R

• Sleeping

• Activity Q

• Sprinting in a 100 m race

• Activity P

• Brisk walking

• Activity S

2. What substance does blood deliver to the digestive system and other parts of the body?

2. Name one useful substance that blood absorbs when it circulates through the digestive system.

Answer explanation

Food particles

Water

2. Name one waste product that blood absorbs when it circulates through the digestive system.

Answer explanation

Carbon Dioxide

What is the role of the heart? What happens when the heart is absent?

Answer explanation

The heart works as a pump to move blood around the body.
Without the heart, blood cannot move, and substances, such as oxygen, cannot be transported around the body.