| A | B |
|---|
| The control centre of a cell | nucleus |
| The genetic material contained in the nucleus | DNA |
| Cells that can differentiate into specific types of cells for replacing body parts | stem cells |
| A group of organs that together perform a life function | system |
| A group of cells of the same type grouped together to perform the same function | tissue |
| The system that breaks down food to particles small enough to be absorbed into the blood | digestive system |
| Rings of muscle at each end of the stomach that keep food moving in one direction | sphincters |
| The food tube | oesophagus |
| The windpipe | trachea |
| The system responsible for carrying food and oxygen to the cells and removing wastes | circulatory system |
| Blood vessels that carry blood to the heart | veins |
| Blood vessels carrying blood away from the heart | arteries |
| Blood that is rich in oxygen | oxygenated blood |
| The system that is responsible for bringing oxygen into the body and removing carbon dioxide | respiratory system |
| The smallest blood vessels in the body | capillaries |
| Another name for a nerve cell | neuron |
| The gap between nerve cells | synapse |
| Chemical messengers that act gradually and are long lasting | hormones |
| The fight and flight hormone | adrenalin |
| The system that provides support for the body | skeletal system |
