Answer:
Cell membranes
Explanation:
It is probably because of cell membranes.
B, sometimes people think it wastes too much time
A physician uses Body Fat Percentage to evaluate the status of a patient's body composition.
Endocrine gives the correspondence through hormones; secrete their hormones directly into the bloodstream and uses blood vessels as information channels. ... Theendocrine and integumentary systems correlate with the sense organs, which react to heat, cold, vibration, texture, and pressure.
The answer is probably B but C is also technically correct however that function is less important than to give the body oxygen.
