Downloaded 15 times
Uploaded byChris Haller
The nervous system
The nervous system allows signals to be sent through the body and is made up of the central nervous system (brain and spinal cord) and peripheral nervous system. The central nervous system controls many bodily functions like temperature, blood pressure, and hunger through the hypothalamus. The peripheral nervous system is outside the brain and spinal cord and includes the somatic nervous system controlling voluntary muscles and autonomic nervous system controlling involuntary muscles. The brain controls the nervous system and uses a large amount of the body's oxygen and blood. Damage to nerves can cause issues like paralysis or loss of feeling.
More Related Content
Similar to The nervous system
More from Chris Haller
The nervous system
- 1. The Nervous Systemระบบประสาท The nervous system is a way to send signals through your body.
- 2. Nerves under amicroscope
- 3. All multicellular organismshave a nervous system EXCEPT placozoa sponge
- 4. Central Nervous System Thecentral nervous system is the brain and spinal cord. The nervous system can communicate up to 100 meters per second.
- 5. The hypothalamus The hypothalamuscontrols many things in your body, like temperture, blood pressure, water balance, thirst and hunger.
- 6. Peripheral nervous system Theperipheral nervous system is outside the brain and spinal cord. There are about 65 kilometers of nerves in the human body!
- 7. Somatic nervous system •This part of your peripheral nervous system controls voluntary muscles.
- 8. Autonomic nervous system •This controls involuntary muscles like your heart.
- 9.
- 10. The brain The braincontrols the nervous system. It weighs about 1300 grams. Our brain loses about 1 gram per year as we age. The brain uses 20% of the oxygen and blood in the body. The brain makes enough electricity to light a lightbulb.
- 11. Stress • Long termstress can damage your nervous system.
- 12. Scientists are tryingto create an artificial brain.
- 13. Neuron cells They arethe largest cells in the body. Up to 1 meter long! They communicate information around the body.
- 14. Sensory and motornerves • Sensory nerves receive information and send it to the brain. • Motor nerves send information from the brain to the muscles.
- 15. Ulnar nerve “funnybone” If you hit your ulnar nerve, it can be very painful.
- 16. Optic nerve The opticnerve sends visual information to the brain.
- 17. Auditory nerve The auditorynerves send sounds to your brain.
- 18. paralyzed Some people cannot movetheir legs and/or arms. This is usually because of a spinal injury or a birth defect.
- 19. When a bodypart “falls asleep” This happens when you squeeze nerves for a long time. Sometimes you feel tingling or pain. After you move, the nerves will “reset”. Sitting a long time on a hard floor can cause this.
- 20. reflex A reflex happenswithout thinking, and is usually done to protect you.
- 21. pain We feel pain becausewe have nerves. If we didn’t feel pain, we would probably die quickly because we wouldn’t know when we are hurt.
- 22. “You’ve got alot of nerve!” • This means that someone is being an arrogant หยิ่ง jerk.
- 23.
- 24. Nerves help usmove • The brain sends messages to muscles using the nervous system.
- 25. Senses • Hearing, touch,sight, smell and taste are your five senses. Nerves let you do these things.
- 26. Is our nervoussystem our “soul”?
- 27. Questions • What areour five senses? • What are some things nerves do? • What can happen if the nerves in your spinal cord are damaged? • What nerves let us see and hear? • What power do our nerves use to communicate? • What are the two main parts of the central nervous system?