Encarta For Kids

Cell Animal Cell   All animals are made up of one or more cells. Animal cells all have the same basic structure, though they differ in how they look and what job they do.  Plant Cell Plants are made up of one or more cells. Each cell is surrounded by a sturdy wall and contains […]

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Cells All plants and animals are made of cells. Most cells are much too small to see. It takes millions of cells, for example, to make just one of your fingers. Some tiny creatures, such as bacteria, are made of only one cell. If you want to see what a cell looks like, you could […]

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Lung Cancer Lung Cancer Cancer can attack any part of the body, including the lungs, shown here. Normal lung tissue is light pink in color, but cancerous lung tissue caused by smoking turns black. Radiation Treatment   Radiation is sometimes used to kill cancer cells. Here, a patient has radiation treatment for cancer of the […]

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Cancer   Cancer—it’s scary word, and a scary disease. Cancer kills a lot of people all over the world. Only heart disease kills more Americans. But there’s good news too. Millions of people who have had cancer are still alive. Doctors have learned a great deal about treating and preventing cancer. WHAT IS CANCER? Cancer […]

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Brain Your brain is your body’s main control center. it controls thinking, emotions, and all the body’s activities that keep you alive. The brain looks like a soft sponge and is protected by a bony skull in the head. Nervous System   The nervous system is made up of the brain, the spinal cord, and […]

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Brain   What kind of supercomputer can write stories, do math problems, draw pictures, play games, see through eyes, hear someone talking, talk back, and network with devices that make snacks in the microwave oven? Your brain and nervous system can do all these things. Do you think a computer will ever be as powerful […]

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Skeletal System   Your body contains 206 bones of various shapes and sizes. Bones protect your internal organs and support your body as you stand, sit, walk, and run. Common Fractures   A break in a bone is known as a fracture. In a greenstick fracture, the bone does not break all of the way […]

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Bones And Skeleton   Squeeze your arm. The outside of your arm is soft, but there is a hard part inside. The hard part is a bone. There are bones in your arms and in your legs. Bones go up the middle of your back. They go around your chest. All of your bones together […]

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Bacteria   Bacteria are tiny, one-celled organisms that play an important part in all life on Earth. They come in three basic shapes—rod, sphere, and spiral. This bacterium is a spiral type known as a spirochete. Parts of a Bacterium   A bacterium is protected by an outer cell wall. Just inside the cell wall […]

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Bacteria Peek into a clean room with no one in it. There are no pets in the room. There are no plants in the room. It looks like there is nothing alive in the room. The room, however, is swarming with life. Billions of tiny life forms called bacteria cover the tables and chairs and […]

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