endocrine system

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  • Endocrine system: made up of glands that secrete chemicals called hormones, directly into the bloodstream or lymph system affecting internal activity and visible behavior
    • pituitary gland: speeds body development - too less secretion can lead to hypopituitary dwarfism and too much secretion can lead to gigantism - governs functioning of other glands - directed by hypothalamus
    • Pineal gland: helps regulate sleep cycles and body rhythms
    • Thyroid gland: regulates rate of metabolism - too much lead to hyperthyroidism and too less leads to hypothyroidism
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