Bethany Davies, Unit 5 Endocrine Organs 1 Bethany Davies, Unit 5 Hormone Adrenalin Endocrine Organ Adrenal glands Corticosteroids Adrenal cortex Insulin Pancreas Thyroxin Thyroid glands Oestrogen Ovaries Progesterone Ovaries Testosterone Testes (Also tiny amount in ovaries). Pancreas Glucagon Noradrenalin Adrenal glands (Adrenal medulla) Thyroid Stimulating Hormone Adrenocorticotropic Hormone Prolactin Pituitary gland Calitonin Thyroid gland Melanocyte Stimulating Hormone Pineal gland Pituitary gland Pituitary gland Action of the Hormone Produces a sudden burst of energy. This hormone helps stress response, immune response and regulation of inflammation, carbohydrate metabolism, protein catabolism, blood electrolyte levels, and behavior. Stimulates cells to use glucose Makes energy and keeps body temperature regulated. Stimulates breast development, helps the vagina, uterus and fallopian tubes to mature and regulates the menstrual cycle. Regulates menstrual cycle. Promotes muscles and bone growth. Raises the level of the glucose in the blood. Stress hormone, increases blood pressure. Stimulates the thyroid gland. Stimulates the adrenal cortex. Stimulates milk for nursing mothers. Controls the amount of calcium circulating in the blood. Regulates sleep/wake patterns. 2 Bethany Davies, Unit 5 Pineal Function of the pineal body/gland is endocrine. This contributes the alertness or consciousness of one's self and produces "melatonin" which regulates the sleep/wake patterns. The name derives from its shape. Parathyroid Gland The parathyroid glands secrete parathyroid hormone (PTH). The main function of PTH is to regulate the levels of calcium and phosphate in the blood. Adrenal Glands The adrenal glands are endocrine glands that produce hormones. A hormone is a chemical messenger. Each hormone influences specific organs or tissues, thus regulating a certain body process. The adrenal glands are shaped like a boomerang and located on top of each kidney. The adrenal glands are about the size of the end of your thumb. The adrenal glands produce hormones that affect almost every system in your body. When the adrenal glands fail to work properly, serious diseases and disorders can develop. One of the hormones that the adrenal glands secrete is called adrenaline. Adrenaline produces a sudden and remarkable burst of energy. http://www.mamashealth.com/organs/adrenal.asp Pituitary Gland Located at the base of the brain, the pituitary gland secretes hormones which govern the functions of the other endocrine glands such as the thyroid, adrenal glands, ovaries and testes in the human body. This gland is again controlled by the hypothalamus and together they control other endocrine functions. The gland consists of three sections: the anterior lobe, the intermediate lobe and the posterior lobe. The functions of each of these sections make up for the entire pituitary gland function. Thyroid Gland The Thyroid is a small butterfly shaped gland, which is located in the lower front part of the neck. The thyroid’s main job is to produce thyroid hormone that act like messages and tell specific body parts what to do. Thyroid hormones help the body make energy, keep body temperature regulated and assist other organs in their function. The two main hormones the thyroid produces are thyroxin and triiodothyronine. http://health.learninginfo.org/function-thyroid-gland.htm Thymus gland The main thymus gland function is to produce and process lymphocytes or T cells (in T cells 'T' stands for thymus derived). Lymphocytes are White Blood Cells which are also known as leukocytes. After the white blood cells mature, they leave the thymus gland and get settled in the spleen and the lymph nodes, where a fresh batch of T cells is produced. These white blood cells are the body's immunity system and protect the body by producing antibodies that stop the invasion of foreign agents, bacteria and viruses. These cells also ensure the proper functioning of the body system and look after the wear and tear of the organs. The thymus gland produces a hormone called thymosin, 3 Bethany Davies, Unit 5 which stimulates the T cells in the other lymphatic organs to mature. This gland also produces another hormone called thymopoietin, which is protein present in the mRNA and is encoded by the TMPO gene. http://www.buzzle.com/articles/thymus-gland-function.html Pancreas The function of the pancreas is to secrete hormones that affect the level of sugar in the blood. The hormones that are produced are; Glucagon which raises the level of glucose (sugar) in the blood, Insulin which stimulates cells to use glucose and Somatostatin which regulates the secretion of glucagons and insulin. http://www.montana.edu/wwwai/imsd/alcohol/Vanessa/vwpancreas.htm Ovaries The most important hormones made by the ovaries are known as female sex hormones and the two main ones are oestrogen and progesterone. The ovaries also produce some of the male hormone, testosterone. During puberty, oestrogen stimulates breast development and causes the vagina, uterus and Fallopian tubes to mature. It also plays a role in the growth spurt and alters the distribution of fat on a girl's body, typically resulting in more being deposited around the hips, buttocks and thighs. Testosterone helps to promote muscle and bone growth. From puberty onwards, LH, FSH, oestrogen and progesterone all play a vital part in regulating a woman's menstrual cycle, which results in her periods. Each individual hormone follows its own pattern, rising and falling at different points in the cycle but together they produce a predictable chain of events. One egg (out of several hundred thousands in each ovary) becomes 'ripe' (mature) and is released from the ovary to begin its journey down the Fallopian tube and into the womb. If that egg isn't fertilised, the levels of oestrogen and progesterone produced by the ovary begin to fall. Without the supporting action of these hormones, the lining of the womb, which is full of blood, is shed, resulting in a period. http://www.netdoctor.co.uk/womenshealth/features/hormone.htm 4