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The endocrine system


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The endocrine system

  1. 1.  Adrenal Glands Ovaries (Women Only) Pancreas (islets of langerhans) Parathyroid glands Pineal Glands Pituitary Glands Testes (Men Only) Thymus Gland Thyroid Gland
  2. 2.  Located above each of the kidneys. 2 sections: adrenal cortex & adrenal medulla Outer- manufactors several different families of hormones. The hormones regulate secondary sexual characteristics. All hormones secreted by the adrenal cortex are steroid hormones.Adrenal Glands
  3. 3. Ovaries (Women Only) Females gonads located in the lower abdomen pelvic cavity of the female. This is a part of the reproductive system as well. The ovaries is where an unborn fetus lives for a gestational period of forty weeks until birth.
  4. 4. Pancreas Located along the lower curvature of the stomach. The only organ in the body that has both endocrine and exocrine functions. The exocrine portion releases digestive enzymes through a duct into the duodenum of the small intestines.
  5. 5.  Four tiny parathyroid glands are located on the dorsal surface of the thyroid gland. Parathyroid hormone secreted by these glands regulates the amount of calcium in the blood. If the blood calcium levels fall too low, parathyroid hormone levels in the blood are increased and will stimulate bone breakdown to release more calcium into the blood.
  6. 6. Pineal Gland Small pine cone shaped gland that is part of the thalamus region of the brain. Glands secrete melatonin, a hormone now well understood, but that plays a role in regulating the body’s circadian rhythm.
  7. 7. Pituitary Gland located underneath the brain Small marble shaped gland that is divided into an anterior lobe and a posterior lobe. Both lobes are controlled by the hypothalamus(a region of the brain active in regulating automatic body responses. Anterior lobe secretes several different hormones.(growth, thyroid stimulating, adrencorticotrophin, prolactin, follic le-stimulating and luteinizing hormones, melanocyte-stimulating & antidiuretic and oxytocin hormones)
  8. 8.  Two oval glands located in the scrotal sac of the male. The male gonads Produce gametes, sperm and the male sex hormone, testosterone. Testosterone produces the secondary sexual characteristics and regulates sperm production
  9. 9.  A part of the immune system as well. Is also one of the endocrine glands because it secretes the hormone thymosin (it is important for the proper development of the immune system. It is present at birth and grows to its largest at puberty. At puberty is shrinks and is connected with other tissues.Thymus Gland
  10. 10. Thyroid Gland Is the shape of a butterfly and it has a right and left lobe. Located on either side of the trachea and larnyx The thryoid cartilage, or Adams apple is located just above the thyroid gland. Produce the hormones thyroxine and triiodothyronine. These hormones regulate the production of energy and heat in the body to adjust the body’s metabolic rate.
  11. 11. The end