The pictures shown refers to the digestive, circulatory and respiratory system and they interact with each other to ensure the organism body metabolism is done for its survival.
What are Biological systems?
This comprises of different types of organs which work together to achieve a common purpose or function.
The digestive system for example breaks down the food which is the source of nutrients and energy for the body cells. The circulatory system distributes it to other parts of the body via the heart.
On the other hand , the respiratory system ensures various products are broken down through the intake of oxygen which ensures cells don't die and perform at their optimal level in the body.
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