Most cells are too small to see with the naked eye. To see what a cell looks like, you have to use a microscope.
The genes of the cell are found in the nucleus. The genes tell the cell how to do its work.
The clear, jelly-like substance around the nucleus is called cytoplasm. Many of the functions of the cell take place in the cytoplasm.
There are are different types of animal cells. The various parts of your body, such as your muscles, skin, and brain, are composed of different kinds of cells. Each type of cell performs a different function. Skin cells for example, keep harmful things from getting into your body. Brain cells allow you to think and muscle cells allow you movement.
Animal cells come in various shapes. Red blood cells are round like wheels Skin cells are flat. Muscle cells are long and thin. Nerve cells have long arms and look like tree branches.
The cytoskeleton is a kind of supportive framework that gives an animal cell its shape. It holds the insides of the cell in place.
The organs of a cell are known as organelles. Organelles do all the things a cell needs to stay alive and to perform its job. Each type of organelle has a different function. The nucleus is the organelle which contains the genes. The genes carry code instructions that tell the cell what to do and when to do it.
The cytoplasm has organelles that carry out other functions. Mitochondria are organelles that generate energy for the cell. Proteins, a material that cells need to survive, is made in organelles called the endoplasmic reticulum and the Golgi apparatus. The organelles called Lysosomes act as the cell’s recycling center and waste disposal.
Animal cells are surrounded by a semi permeable structure called the cell membrane. The cell membrane lets some materials pass into and out of the cell. For the most part it keeps other, harmful materials out.