9781422276112

The human body is made up of several body systems, organs, numerous tissues, and billions of cells. Each system, organ, and tissue of the human body performs specialized functions.

Parts of the Human Body • The head contains the brain. • Eyes help us see. • The nose helps us smell. • The mouth helps us taste and eat. • The chest is enclosed by the ribcage. • The abdomen contains the digestive and reproductive organs. • Fingers help us grasp. • Hips support the lower limbs. • Legs help us walk and run. • Feet support the body’s weight and allow movement.

WORDS TO UNDERSTAND

secretion: biochemical released by the tissues and glands for the use of the organism or excretion. tailbone: the final segment of human vertebrae. vestigial: a leftover bit of something that used to be larger or more important.

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