Cell Structure

In: Science

Submitted By bsarthur96
Words 864
Pages 4
Every living thing on Earth has cells. Cells are made up of small pieces called proteins and organelles. The larger pieces are tissues and systems. Cells hold biological equipment that keeps them alive. A cells job is to organize. Each cell has a different function. Organisms grow and survive better when cells are present. If people were only made up of one cell they could only grow to one size. You also would not have a nervous system or muscles. A person’s body is made up of trillions of cells. Animal-like cells differ from plant-like cells. An animal-like cell could be a tiny microorganism or a nerve cell. Plant cells differ because they have protective structures with walls. Each organism has its own unique cell. People have hundreds of cells that are used to do different things in our bodies. All cells are surrounded by a membrane. Animals, people and insects have a nervous system. Some of the systems are more complex than others. A person’s nervous system consists of two parts: The central and the peripheral. The central nervous system is your spinal cord and your brain. The peripheral system makes up your organs, body and muscles. The reason people can react or take action is directly related to our nervous system. How people and animals smell, see and taste are related to our nervous system. Some of the things our nervous system does we don’t even think about. All of the systems in our bodies take direction from our nervous system. If we are eating our body starts to digest our food without us doing anything. That has to do with our nervous system and we have no idea it is even going on. Muscles in our body are made up of three kinds of tissue: Smooth, cardiac and voluntary. Each type of tissue has a different part of the body it is in. The smooth tissue is in our organs, the cardiac is in our heart, and the voluntary is the muscle that helps us move. We…...

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