Nervous and Endocrine Systems - PowerPoint PPT Presentation

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Nervous and Endocrine Systems

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  1. Nervousand EndocrineSystems

  2. Nervous System

  3. Functions • Thought processes • Coordination of movement • Relays information from the body to the brain or other organs

  4. Organs • Brain – main control center for the body. • Spinal Cord – column of nervous tissue that runs through the backbone. • Nerves – bundles of tissue that carry impulses from one place to another. • Neurons – nerve cells

  5. How it Works

  6. Central Nervous System • Brain and Spinal Cord • Peripheral Nervous System • All other nerves

  7. Nerve Cell • Cell Body – central part • Axons – carry signals from one nerve cell to others. • Dendrites – receive signals from other nerve cells. • Synapse – area between nerve cells where signals are passed. • Neurotransmitter – chemicals that carry nerve signals.

  8. The Brain • Cerebrum – center for thought, imagination, and emotions. • Cerebellum – controls balance, posture, movement, and coordination. • Brain Stem – guides signals from spinal cord to other parts of the brain, and controls many autonomic actions such as breathing and heartbeat.

  9. Cerebrum

  10. Endocrine System

  11. Functions • Works with nervous system to coordinate and regulate the body. • Produces Hormones

  12. Hormones • Substances secreted by cells in specific organs that act to regulate other cell functions in the body.

  13. Organs • Pituitary Gland – growth • Pineal Gland – sleep patterns • Parathyroid Gland – regulates blood calcium • Thymus Gland – regulates immune system • Thyroid Gland – regulates metabolism • Adrenal Gland – “fight” or “flight” response • Pancreas – regulates blood sugar • Gonads – stimulate development of secondary sex characteristics and reproductive cycles. (ovaries and testes)

  14. How It Works • Signals are sent by the nervous system to a particular gland. • The gland releases hormones into the bloodstream. • The hormones control many types of cells to regulate the specific body process.