Circulatory System

What is the circulatory system?

• The body's breathing system

• The body's system of nerves

• The body's food-processing system

• The body's blood transporting system

From what source do cells get their food?

• blood

• oxygen

• other cells

• carbon dioxide

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Why is oxygen important to blood and to the cells?

• Oxygen helps the blood to clot

• Oxygen brings food to the cells

• Oxygen is necessary for cell growth and energy

• oxygen is not important - carbon dioxide is the most important substance in the body

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What type of blood vessels carry blood away from the heart?

• Veins

• Arteries

• Capillaries

• Arteries, veins, and capillaries

Why is blood that flows from the lungs to the heart bright red rather than dark red?

• Oxygen makes it red

• Carbon dioxide makes it red

• Gastric juices produce the red color of the blood

• The lungs add a pigment (dye) to blood as it flows through them

What part of the blood carries minerals, vitamins, sugar, and other foods to the body's cells?

• Plasma

• Platelets

• Red blood cells

• White blood cells

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What is the main job of the red blood cells in the blood?

• to clot blood

• to fight disease

• to transport oxygen & CO₂ to/from the body's cells

• to transport proteins & fats to/from the body's cells

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Which part of the blood is a colorless liquid?

• Plasma

• Platelets

• Red blood cells

• White blood cells

What is the function of the blood vessels?

• they pump blood to the heart

• they filter impurities from the blood

• they carry blood to all parts of the body

• they carry messages from the brain to the muscles

What is the organ that pumps blood all throughout the human body?

• The lungs

• The heart

• The kidneys

• The blood vessels