How does biodiversity contribute to the sustainably of a habitat

in the case of plants if one plant grows in an area the soil becomes nutrient deficient. But with more types of vegatation growing the soil also gains nutrients which can benifent other plants

the major parts of the digestive system:

salivary glands.

pharynx.

esophagus.

stomach.

small intestine.

large intestine.

rectum.

accessory digestive organs: liver, gallbladder, pancreas.