Which is a feeling of physical discomfort caused by the body's need for nutrients?
The purpose of the digestive system is to break down food into nutrients and waste. The nutrients nourish the body, the waste is sent through the excretory system.
oxygen and nutrients
photosynthesis is the growing stage of a plant and respiration is the human bodys breathing system i hope this answer is okay
So that they had the nutrients and proteins there bodys needed to survive, like how humans eat cows, or cows who eat grass.
because water makes up 50-70% of an adults body weight. water's essential for the bodys growth and maintainance, as it's involved in a number of processes. water is lost from the body through urine and sweat, and must be replaced through water. if you don't drink enough water you can becom dehydrated.