Animal bodies are made up of several systems. Animals and human beings carry out the basic life process of interaction, nutrition and reproduction with these systems.
Nutrition:
Our digestive system uses the food and water we eat or drink to provide energy for our muscles. The respiratory system absorbs oxygen and the circulatory system transports it to our muscles so we can move and grow.
Interaction:
The sense organs, the nerves and the brain form the nervous system: it detects information. The muscular and skeletal systems enable us to react to that information.
Reproduction:
Our reproductive system enables us to reproduce by having children. To reproduce, male and female cells combine and slowly develop into an embryo, and then a foetus. The foetus grows into a baby in its mother's uterus.
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