In order for cells of the body to receive nutrients from the food that we eat, digestion must be followed by . * 1 point excretion cellular respiration fluid retention . Anaerobic respiration

Anaerobic respiration

Explanation:

The human digestive system is made of gastroenteritis and organs such as saliva, tongue, and glands, etc. The digestion involves the breakdown of food substances into smaller components. This begins in three phases. Chewing leads to the breakdown of food, saliva contains enzymes and the stomach consists of gastric glands.

Cell division is important to single celled organisms because it allows the cells to reproduce. through cell division, cells make exact copies of themselves. when single celled organisms go through cell division, they make exact copies of themselves which is how they reproduce.