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The Exocrine System

The Exocrine System. (Example Animal Presentation). Endocrine system – system of glands, each of which secretes a type of hormone to regulate the body. Signals are passed through the blood to target cells or organs Hormones fit like a piece of a puzzle into the target cell.

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The Exocrine System

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  1. The Exocrine System (Example Animal Presentation)

  2. Endocrine system – system of glands, each of which secretes a type of hormone to regulate the body Signals are passed through the blood to target cells or organs Hormones fit like a piece of a puzzle into the target cell. What is the endocrine system?

  3. Hormones – molecule (protein or lipid) that is transported throughout the body through blood and stimulates organs to respond in certain ways Endocrine glands – ductless glands that produce hormones Target cells – cells that the hormones bind to in order to trigger a response What are the main features of the endocrine system?

  4. Why is the endocrine system important? • Environment is always changing – animals need a way to help them keep up with it. • Ex. A high level of CO2 is detected in the brain…!!!

  5. Metamorphosis – change in form series of molts as the larva or nymph grows into an adult Endocrine System in Class Insecta

  6. Metamorphosis is controlled by hormones Molting is controlled by ecdyson Final transition to adult is controlled by juvenile hormone Absence of hormone stops molting process Endocrine System in Class Insecta

  7. Endocrine System in Class Mammalia • controls metabolism • maintains water balance • regulates the level of calcium in the blood • aids in the development of a proper immune response • helps the body respond to stress

  8. aids in the development of a proper immune response helps the body respond to stress regulates daily sleep-wake cycles regulates the level of glucose in the blood helps in the development of male/female secondary sex characteristics helps in the production of eggs, sperm http://www.youtube.com/watch?v=kIPYVV4aThM

  9. How does the endocrine system interact with other animal body systems? • Circulatory System: Transports hormones to target cells throughout the body • Respiratory System: Can increase or decrease respiratory rate depending on CO2 levels in the brain • Reproductive System: Helps in the produce of sperm and egg (which are necessary for reproduction)

  10. Interesting Fact In the insect world the largest number of molts is shown by the silver fish. It can change its exoskeleton up to 50 times. It is a primitive wingless insect which keeps growing throughout its life.

  11. Interesting Fact Diabetes is a disease of the endocrine system. Too much glucose is present in the blood because: -body can’t produce enough insulin -cells do not respond properly to insulin produced

  12. Sources • “Biology: Living Systems” (Oram, Hummer, Smoot) • “Biology” (Miller, Levine) • http://insects.about.com/od/growthmetamorphosi1/ss/typesmetamorph_4.htm • http://www.umd.umich.edu/eic/aquatic_insecta/insect_metamorphosis.htm

  13. Test Question All of the following are important parts of the endocrine system EXCEPT • blood stream • hormones • lungs *not to be included on your powerpoint…

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