PHGY 209 Lecture Notes - Abdominal Cavity, Muscular Layer, Serous Membrane
Document Summary
The necessary supplies in this case refer to the various nutrients. The homeostasis of nutrients: how are they made available and how are they utilized, exactly what the nutrients are and what role they will play in the body is studied as part of nutrition. How are foods which are ingested converted to absorbable molecules. Need to appreciate structure before can fully understand the function of the digestive system. Our digestive tract is a hollow tube, has lumen, and it too communicates with the external environment. There are 2 stages of development which are incorporated in the more advanced animals: growth of the digestive system, its differentiation, growth 1. Growth manifests at two levels of the tract. It is greatly elongated: earthworm - from one end to the other end of the animal, in humans its many times the length of the trunk where the organs are located.
