Respiratory system and circulatory system

Tiny air sacs in the lungs where the exchange of oxygen and carbon dioxide takes place.

Two organs that remove oxygen from the air and pass it into your blood.

Muscle that helps your lungs pull in air and push it out.

A blood vessel that carries blood to the heart from tissues and organs in the body.

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The smallest type of blood vessel. A capillary connects an arteriole (small artery) to a venule (small vein) to form a network of blood vessels in almost all parts of the body

Muscular organ that pumps blood throughout your body.

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Large vein carrying deoxygenated blood into the heart.

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