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The circulatory system moves only oxygen to the body's cells.
False
The heart is a muscular organ that pumps blood to all parts of the body.
True
Blood vessels include capillaries, arteries, and veins to carry blood pumped by the heart.
True
Oxygen-rich blood returns to the heart's right atrium before entering the left ventricle.
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Carbon dioxide is removed from the body when red blood cells pick up oxygen in the lungs.
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The heart has five chambers to separate oxygen-rich and low-oxygen blood.
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Blood delivers oxygen and nutrients but does not remove waste products from tissues and cells.
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Blood gathers food nutrients from the large intestine as it travels through capillaries.
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Blood that is high in oxygen collects in the heart's left atrium.
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The digestive system consists of the digestive tract and the liver only.
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The digestive system breaks down food into complex nutrients such as carbohydrates, fats, and proteins.
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Saliva contains enzymes that start to digest the proteins in food.
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The oesophagus carries food from the stomach to the mouth.
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The stomach breaks down food with gastric acids to help with digestion and absorption of vitamins and minerals.
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The digestive system begins at the mouth and ends at the large intestine.
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Saliva contains enzymes that start to digest the carbohydrates in food.
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The oesophagus is responsible for breaking down food with liquid (gastric acids) to help with digestion and absorption of vitamins and minerals.
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The stomach breaks down food into simple nutrients such as carbohydrates, fats, and proteins.
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Blood delivers oxygen and nutrients and also removes waste products from tissues and cells.
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