This is the communication system within the body and it
functions by sending hormones into the bloodstream. Each gland performs a
specific role that affects other glands and body systems. The pituitary
gland regulates tissue growth (bones and muscles), synthesizes proteins
and mobilizes fats. The thyroid gland regulates the rate of cell and
DNA synthesis and division and protein synthesis. The pancreas regulates
blood sugar levels by releasing insulin and glucagon. The gonads
produce sex hormones (estrogen in females, testosterone in males) which
make up the female and male characteristics and reproductive cells.
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