16 Amazing Cells-High

Amazing Cells FOCUS Question Why are there so many different kinds of cells?

All plants and animals are made of the same thing. Cells! Your whole body is made of cells, from your head to your toes! Some living things have only one cell. Other living things have many cells. Word Wise The word cell sounds the same as the word sell.

Too Small to See Cells are very small! We need help to see them. A microscope (MY-kro-skope) is a machine that makes small things look big. People use microscopes to look at things they cannot see with just their eyes.

Tiny Creatures An amoeba (uh-MEE-buh) is a tiny living thing. It is made of just one cell. You can only see an amoeba with a microscope. It looks like a blob of jelly!

So Many Cells! Larger animals have many kinds of cells. Some cells are round and wide. Some cells are long and thin. Each cell has a job to do. Its size and shape help the cell do its job. Do You Know? There are about two hundred different kinds of cells in the human body!

Blood Cells Blood moves to different parts of the body. Animals have red and white blood cells. Red blood cells are thin and can bend. They carry a gas called oxygen (OK-sih-jun). White blood cells come in different shapes and sizes. White blood cells help keep animals from getting sick.