|
In this topic you will learn about how different body parts work together to help an organism survive.
Organisms can have four main kinds of parts. Each part helps the organism survive in some way.
- Parts that support and protect: these include stems, skin, bark, shells, feathers, scales, and bones.
- Parts that move: arms, legs, wings, and fins are moving parts. Plants can't move from place to place.
- Parts that get information: eyes, ears, skin, noses, and tongues gather information.
- Parts that take in materials: roots, leaves, mouths, noses, skin, and other openings in organisms can take in materials.
- Body parts are made of smaller parts. These smaller parts work together in systems. A system is a group of parts that work together.
Bones and muscles form a system that supports your body and helps you move. Being able to move helps organisms survive. Moving parts help organisms get food, escape from danger, and build or find homes. Different body parts collect different information. Eyes get light information. Ears receive sounds. The skin gets information about touch.
Parts of organisms take in materials to get energy. Animals take in food and oxygen. Plants make their own food by taking in water and minerals. A mineral is a substance found in nature that is not a plant or an animal. Gases enter and leave plants through leaves. Animals breathe gases in and out through lungs or gills. Most large organisms also have liquid and solid wastes. Special systems in their bodies get rid of these wastes.
|
