Circulatory System Quiz

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To facilitate the movement of air in and out of the lungs.
To transport blood throughout the body, supplying oxygen and nutrients. (correct)
To help in the digestion of food by absorbing nutrients.
To regulate body temperature through sweat production.

They serve as the main blood vessels returning blood to the heart.
They pump blood directly into arteries.
They connect the heart to the lungs exclusively.
They are responsible for the exchange of substances between blood and tissues. (correct)

<p>They carry blood toward the heart. (D)</p> Signup and view all the answers

<p>Blue (C)</p> Signup and view all the answers

away from the heart

to the heart

arteries and veins, allowing gas exchange

Transports blood, delivering oxygen and nutrients; removing wastes

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Arteries, veins, and capillaries

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The circulatory system's primary function is to transport oxygen, nutrients, and hormones throughout the body, while also removing waste products like carbon dioxide.

Arteries are responsible for carrying oxygenated blood away from the heart to the rest of the body.

Capillaries are tiny blood vessels that connect arteries and veins, allowing for the exchange of nutrients, oxygen, and waste products between blood and surrounding tissues.

Veins are responsible for carrying deoxygenated blood back to the heart from the body. While arteries generally carry oxygenated blood, there are exceptions, such as the pulmonary artery which carries deoxygenated blood to the lungs.

Veins are typically represented in blue in diagrams of the circulatory system., though this is not entirely accurate. Blood color is dependent on its oxygenation and saturation within blood vessels.