A cell divides into two new cells. Each new cell is the same as the original cell. Cells of all one type are usually grouped together to form a tissue. A tissue is made up of a group of similar cells that carry out the same role. Our body is made up of many different types of tissue for example, muscle tissue, bone tissue and nervous tissue. Some times several tissues are grouped togheter to form structures with set functions. These structures are called organs.
What should you know about the human body?
WHAT´S IN BLOOD?How the body works?
The next level of organisation within an organism is a system. A system is a series of tissues and organs that work together and carry out a set function.
| SYSTEM | FUNCTION |
| Circulatory | transports material around the body in the blood  |
| Respiratory | takes oxygen into the body  |
| Digestive | breaks down and absorbs food  |
| Nervous | detects the environment; controls the body  |
| Reproductive | produces new individuals :-o |
| Skeletal | allows movement  |
| Excretory | removes waste from the body  |
BACTERIA
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