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Anatomy of the Skin Facts about the skin The skin is the body's largest organ. It covers the entire body. It serves as a protective shield against heat, light, injury, and infection. The skin also: Regulates body temperature. Stores water and fat. Is a sensory organ. Prevents

Cholesterol in the Blood Facts about cholesterol Cholesterol is a fat-like, waxy substance that can be found in all parts of your body. It helps your body make cell membranes, many hormones, and vitamin D. The cholesterol in your blood comes from 2 sources: the foods you eat and

Anatomy of the Breasts Each breast has 15 to 20 sections, called lobes. They are arranged like the petals of a daisy. Each lobe has many smaller structures called lobules. These end in dozens of tiny bulbs that can make milk. The lobes, lobules, and bulbs are all linked by thin

Molds in the Environment What is mold? A mold is a microscopic fungus that grows and lives on plant or animal matter. It can also live on nonorganic objects. Most molds are made up of filaments. They reproduce through the production of spores. Spores spread by air, water, or