Practice understanding the main parts and functions of the circulatory system, including the heart, blood, and blood vessels.
Read each problem carefully. Answer in complete sentences and explain your thinking when needed.
How blood, the heart, and blood vessels work together
Biology - Grade 6-8
- 1
What is the main job of the circulatory system in the human body?
- 2
Name the four chambers of the heart.
- 3
Explain the difference between arteries, veins, and capillaries.
- 4
What is the role of red blood cells in the circulatory system?
- 5
What is the role of white blood cells in the body?
- 6
What do platelets do in the blood?
- 7
Why is the left ventricle of the heart more muscular than the right ventricle?
- 8
Describe what happens to blood as it travels through the lungs.
- 9
What is plasma, and why is it important?
- 10
A student says that all veins carry blood without oxygen. Explain why this statement is not completely correct.
- 11
How does exercise affect heart rate, and why does this happen?
- 12
Explain how the circulatory system works with the respiratory system.