1. Endocrine Glands
Pineal Gland: a very small gland that performs most of it’s function between 0-7 years
After 7 the gland shrinks in a process called involution
The gland produces serotonin at day, melatonin at night

2. Thyroid Gland
The gland is made of thyroid follicles that produce (T3) triiodothyronine, (T4) thyroxine and calcitonin
(T3) & (T4): work together to raise heat production, secreation increases during winter, also very important in fetal growth
Calcitonin: increases Ca2+ storage in bone

3. Parathyroid Produces parathyroid hormone (PTH)
PTH: promotes bone breakdown when blood Ca2+ is low

4. Adrenal Glands Adrenal medulla: is not fully formed until age three
Produces 85% of epinephrine in the body
Epinephrine: releases high-energy fuels such as fats and Glucose
It also inhibits insulin so glucose is not needlessly burned

5. Adrenal Glands Adrenal Cortex produces three hormones
Mineralocorticoids: electrolyte balance
Glucocorticoids: promotes fat burning
Sex steroids: produces weak androgens that the building blocks for testosterone and estrogen