1 / 23

Body Systems

Body Systems. The Nervous System. Coordinates movements and maintains balance Receives information about what is going on, processes the information, and forms a response. Carries messages to and from brain and spinal cord TWO divisions: central and peripheral. What is the Nervous System?.

neci
Télécharger la présentation

Body Systems

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Body Systems The Nervous System

  2. Coordinates movements and maintains balance • Receives information about what is going on, processes the information, and forms a response. • Carries messages to and from brain and spinal cord • TWO divisions: central and peripheral What is the Nervous System?

  3. The basic unit of the nervous system – a cell • Carry messages from one part of body to another • Junctions called SYNAPSE Neurons

  4. Different types of neurons in system that perform specific roles Neurons

  5. The “Control Center of the Body” • Brain and Spinal Cord Central Nervous System

  6. Weighs about 3 pounds – moist and spongy • Made up of about 100 BILLION neurons • Protected and cushioned by layers of membranes and fluids • 3 Major Regions • Cerebrum • Cerebellum • Brain Stem CNS – The Brain

  7. CNS – The Brain

  8. Cerebrum • 85% of brain’s weight • Specialized Regions • Deep groove separates • Frontal Lobe: voluntary movements; emotions • Occipital Lobe: vision • Parietal Lobe: sensory information • Temporal Lobe: hearing, balance, and speech CNS – The Brain

  9. Cerebellum • Coordinates movements and balance • Simple movements would be impossible CNS – The Brain

  10. The Brain Stem • Midbrain: adjusting to sensory information • Pons: breathing and coordination • Medulla: automatic functions: heart rate, blood pressure, and swallowing CNS – The Brain

  11. Thick column of nerve tissue linking brain to most of nerves of peripheral system • Vertebrae surround and protect • Surrounded by protective membranes and bathed in fluid CNS – The Spinal Cord

  12. REFLEX: automatic response to your environment • Think of a hot flame! • Some reflexes controlled by spinal cord only, not brain, to enable your body to react faster protecting you from harm. CNS - Reflexes

  13. Includes the network of nerves that link the rest of your body to your brain and spinal cord. • NERVE: bundle(s) of axons packaged with connective tissue Peripheral Nervous System

  14. Some nerves carry info from ears, eyes, etc from your outside environment • Others carry info regarding your internal conditions: BP, HR, etc • BOTH deliver their info to the CNS PNS – Sensory Division

  15. SOMATIC NERVOUS SYSTEM: controls voluntary actions • Chewing food, skeletal muscle movements, etc • AUTONOMIC NERVOUS SYSTEM: regulates actions that happen automatically • Breathing, heart beat, digestion, crying PNS – Motor Division

  16. Avoiding Head Injuries • CONCUSSION: swelling of the brain – bruiselike injury due to a blow to the head or rapid head movement (whiplash) • Loss of consciousness, vomiting, drowsiness, confusion, nose bleed Brandon Sutter - Hockey Another Hockey Concussion Keeping Healthy Mike Modano - He IS Alive... "Scrambled Eggs"

  17. COMA: Prolonged period of deep unconsciousness • Sarah's Story • Sarah Speaks Keeping Healthy

  18. Avoiding Head Injuries • Helmets lower risk! • Wear seat belts! • Check water deepness • Avoid drugs and alcohol – lead to poor decisions Keeping Healthy

  19. Avoiding Spinal Cord Injuries • Can result in PARALYSIS: loss of abilities to move and/or feel body parts • Oklahoma vs Florida State • Jahvid Best Keeping Healthy

  20. Avoiding Nerve Injuries • Repeated movements may injure the nerves in that area – Carpel Tunnel, Tarsal Tunnel • Symptoms: Weakness and numbness • Treatment: Splints, medications, surgery • Take breaks, maintain posture! Keeping Healthy

  21. Preventing Infections • Rare in NS because of protection of tissues • MENINGITIS: inflammation of the membranes surrounding brain and spinal cord; viral or bacterial • Stiff neck, severe headache, high fever • Rabies is an infection of the CNS Keeping Healthy

  22. Living with EPILEPSY • Sudden, uncontrolled nerve impulses; flood of brain activity causing a SEIZURE • Epileptics are prone to seizures • Facial twitching, loss of awareness, and muscle spasms may occur during seizures • Possibly caused by genetics, problems during prenatal development, diseases, or head injuries Keeping Healthy

  23. Preventing Headaches • Most common problem • Tension headaches: physical or emotional stress • MIGRAINE: especially severe and long-lasting • Light and noise sensitive, nausea, blurred vision • Proper diet, exercise, and sleep may help prevent, but the cause is unknown • Avoid triggers Keeping Healthy

More Related