Cardiovascular System

What is the most essential function of oxygen transportation in the body?

• Supplying carbon dioxide to the body

• Supplying oxygen to the body

• Removing oxygen from the body

• Removing nutrients from the body

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What happens to carbon dioxide during exhalation?

• It is absorbed into the stomach

• It is absorbed into the blood and transported to the lungs

• It is absorbed into the liver

• It is absorbed into the kidneys

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How do nutrients like oxygen move from the bloodstream into body cells?

• Through veins

• Via capillaries

• Through arteries

• Via lymph nodes

What role does the circulatory system play in disease protection and healing?

• It acts as a barrier to germs.

• It serves as a highway for immune system components.

• It produces white blood cells.

• It directly fights infections.

What are hormones?

• Chemical messengers produced by endocrine glands

• Nutrients absorbed by the digestive system

• Cells that fight infections

• Proteins that build muscles

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How do thyroid hormones affect the body?

• They help direct childhood growth

• They control the brain and other endocrine glands

• They affect the metabolic rate of almost every body organ and tissue

• They transport nutrients

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What is the average body temperature in Fahrenheit?

• 97°F

• 98.6°F

• 99°F

• 100°F

What happens to blood vessels when body temperature begins to rise?

• They constrict to conserve heat.

• They dilate to release excess heat.

• They remain unchanged.

• They shrink to increase heat.

Which of the following is a part of the circulatory system?

• Stomach

• Heart

• Liver

• Kidneys

What are the four chambers of the heart called?

• Left and right atria, left and right ventricles

• Upper and lower atria, upper and lower ventricles

• Left and right atria, upper and lower ventricles

• Upper and lower atria, left and right ventricles