Exploring the Circulatory System Basics

What are the three main components of the circulatory system?

• Blood vessels, blood, nerves

• Heart, lungs, kidneys

• Heart, blood vessels, blood

• Heart, brain, blood vessels

What role does the heart play in the circulatory system?

• Filters blood

• Absorbs nutrients

• Produces blood cells

• Pumps blood

What is the primary function of red blood cells?

• Fight infection

• Produce plasma

• Clot blood

• Carry oxygen

What is the main function of platelets?

• Stop bleeding

• Carry nutrients

• Fight diseases

• Carry oxygen

Which component of blood is primarily responsible for fighting infections?

• White blood cells

• Red blood cells

• Plasma

• Platelets

Which type of blood vessel carries oxygen-rich blood away from the heart?

• Nerves

• Arteries

• Capillaries

• Veins

Which blood vessels are involved in the exchange of nutrients and waste at the cellular level?

• Arteries

• Veins

• All of the above

• Capillaries

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How does the blood return to the heart after circulating through the body?

• Through arteries

• Through capillaries

• Through the lymphatic system

• Through veins

What process describes the movement of nutrients from high to low concentration in the small intestines?

• Filtration

• Diffusion

• Active transport

• Osmosis

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What happens to the nutrients after they are absorbed in the small intestines?

• They are stored in the liver

• They enter the bloodstream

• They are digested further

• They are excreted