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The endocrine system

The endocrine system. The endocrine glands. Controls many body functions exerts control by releasing special chemical substances into the blood called hormones Hormones affect other endocrine glands or body systems Ductless glands Secrete hormones directly into bloodstream

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The endocrine system

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  1. The endocrine system

  2. The endocrine glands • Controls many body functions • exerts control by releasing special chemical substances into the blood called hormones • Hormones affect other endocrine glands or body systems • Ductless glands • Secrete hormones directly into bloodstream • Hormones are quickly distributed by bloodstream throughout the body

  3. Hormones • Chemicals produced by endocrine glands. • Act on target organs elsewhere in body. • Control/coordinate widespread processes: • Homeostasis. • Reproduction. • Growth & Development. • Metabolism. • Response to stress. • Overlaps with the Sympathetic Nervous System

  4. The Endocrine System • Consists of several glands located in various parts of the body • Specific Glands • Hypothalamus • Pituitary • Thyroid • Parathyroid • Adrenal • Kidneys • Pancreatic Islets • Ovaries • Testes

  5. Hypothalamus • Produces several releasing and inhibiting factors that stimulate or inhibit anterior pituitary’s secretion of hormones. • Produces hormones that are stored in and released from posterior pituitary.

  6. Glands Pituitary They control other endocrine glands and regulates growth and blood pressure and water balance .

  7. Thyroid Gland • This gland control the release of energy from food molecules inside cells.

  8. Parathyroid Glands These tiny glands regulate the amount of calcium in the blood.

  9. Thymus Gland Hormones from this glad help the immune system develop during childhood.

  10. Adrenal Glands • These glands release several hormones. Adrenaline triggers the body’s response to emergency situations. Other hormones affect salt and water balance in the kidneys and sugar in the blood.

  11. Ovaries • Located in the abdominal cavity adjacent to the uterus. • Under the control of LH and FSH from the anterior pituitary gland. • Produce eggs for reproduction. • Produce hormones • estrogen • progesterone • Functions include sexual development and preparation of the uterus for implantation of the egg.

  12. Ovaries • Estrogen • Development of female secondary sexual characteristics. • Development of endometrium. • Progesterone • Promotes conditions required for pregnancy. • Stabilization of endometrium.

  13. Testes • Located in the scrotum. • Controlled by anterior pituitary hormones FSH and LH. • Produce sperm for reproduction. • Produce testosterone - • promotes male growth and masculinization. • promotes development and maintenance of male sexual characteristics.

  14. Pancreas • Exocrine function • Secretion of: • amylase • lipase

  15. Exocrine Glands Its involved in the digestive system.

  16. Exocrine Glands vs. Endocrine Glands Exocrine gland Endocrine glands Secreted substances enzyme hormone Made of secretion With ducts ductless Route of secretion Target organ directly =>blood=>target

  17. Exocrine Glands vs. Endocrine Glands • Exocrine glands are glands that secrete their products (enzymes) into ducts (duct glands) which lead directly into the external environment(target organ). They are the counterparts to endocrine glands. Endocrine glands which secrete their products (hormones) directly into the bloodstream(ductless glands).

  18. BY: HUSSAIN ASHOOR ANDMAHDI HARAKE the end

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