Question

Describe the functions of the main organs and systems in plants and animals and relate to this their structure 1)vill in the stomach of the digestive system

Answer 1

Villi are the tiny hair-like projections that line the inside of the small intestine. They contain blood vessels and help absorb nutrients.

These are slender vascular projections that increase the surface area of the membrane.

These project into the intestinal cavity, greatly increasing the surface area for food absorption and adding digestive secretions.