Endocrine System Made up of its glands and hormones The glands are called ductless The release hormones directly into the blood stream
The blood stream transports hormones throughout the body. Each hormone acts on a certain type of tissue called its target tissue.
Pituitary Location: Base of Brain Hormone: Growth hormone Function: stimulates the elongation of bones in the body.
Hypothalamus Controls the pituitary gland Receives information from the nervous system
Thymus Helps develop the immune system
Parathyroid Location: embedded in back of thyroid gland. Hormone: Parathormone Function: Controls the metabolism of calcium
Adrenal Gland Location: on top of kidney Hormone: Adrenaline Function: Raises blood sugar level and increases heart beat and breathing rates.
Islets of lagerphones Location: Pancreas Hormones: Insulin Function: Stimulates glucose uptake by cells. Hormone: Glucagon Function: Promote conversion (change of glycogen to glucose)
Ovary’s Hormone: estrogen Function: Help develop secondary characteristics in females.
The Testes The testes secrete male sex hormones called androgens. Testosterone is an androgen that affects the secondary characteristics in men.
Thyroid Gland Located in the neck in front of the trachea Thyroid gland releases the hormone thyroxine. Function: regulates the rate of metabolism.
Goiter Not enough iodine in the diet (iodine defiance) Causes swelling of the thyroid gland
Goiter
Diabetes Undersecretion of insulin. High blood sugar
Gigantism
Gigantism 12 year old boy Measure 6-5 Oversecreation of growth hormone Occurs during childhood
Tallest man 8 feet 11 inches.
At 7'4" and 500 pounds, Andre the Giant could have been famous for his size alone. His drive, talent and ambition, however, proved to be as big as Andre himself, and the wrestler became legendary for his achievements in and out of the ring.
Acromegaly Occurs in adults Bones of hands face and feet are enlarged Do to the release of growth hormone.
Dwarfism Under secretion of growth hormone during childhood.