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The Nervous System! Controls all other systems!!!.

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Presentation on theme: "The Nervous System! Controls all other systems!!!."— Presentation transcript:

1 The Nervous System! Controls all other systems!!!

2 Main Function of the Nervous System To receive stimuli from inside and outside of the body, to interpret the stimuli, and initiate responses for survival.

3 Division of the Nervous System Central Nervous System (CNS) – Brain – Spinal Cord Peripheral Nervous System (PNS) – Peripheral nerves – Somatic and Autonomic Systems

4 Central Nervous System (CNS) Organ functions – Brain: coordinates all of the body’s activities – Spinal cord: connects the brain to the peripheral nerves Jellyfish have no brain! Human Sheep Cat

5 The Brain Cerebrum: Controls thoughts, voluntary actions, and sensations related to five senses. Cerebellum: Coordinates *voluntary muscle* movements and balance. Brain stem: Located at the base of the brain and controls vital and *involuntary* processes (ex’s: breathing, heart beat, and digestion) Fun fact: It weighs about 3 lbs

6 Human Sheep Cat Cerebrum Cerebellum Brain stem

7 Spinal Cord A bundle of nerves that begins at the brain stem and connects to the peripheral nerves Vertebrae protect the spinal cord

8 Central Nervous System (CNS) Organs and Functions Brain Spinal Cord

9 Peripheral Nervous System Connects the brain and spinal cord to other body parts.

10 Communication is Key How does the nervous system communicate? Neurons and neurotransmitters

11 Terminal Button

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14 Reflexes An involuntary, automatic response to a stimulus. Reflex arc

15 Examples of Reflexes *Knee jerk (helps stand upright) *Blinking (protects eyes; cleans them) *Arm raise (protects face) Coughing (clears airways when irritated) Sneezing (clears airways when irritated) Goosebumps (warm up body) Shivering (warm up body)

16 Music Video Time! vhM&feature=player_detailpage vhM&feature=player_detailpage


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