Nervous System

nervous system photoThe nervous system controls and coordinates functions throughout the body and responds to internal and external stimuli.

Examples: pain, temperature, pregnancy

Site of reasoning- your brain—lets you think. Gives you consciousness.

Nerves are made of many nerve cells
Afferent-sensory nerves carry message to brain
Efferent-motor neurons carry message from brain to muscle.

The nervous system is divided into two parts:
cnsThe Central Nervous System (CNS) that is made up of the brain and the spinal cord.

pnsAnd the Peripheral Nervous System (PNS) all the rest of the nerves throughout the entire body.

human brainThe brain is divided into four main lobes: frontal, parietal, temporal and occipital.

special senses anatomy handout

nervous system review sheet

Special Senses:

 

Eyes have it: eye anatomyEyes enable you to see images, color, and depth. The collect visual information and send it via the optic nerve to your brain (occipital lobe).

 

 

Ears: There are three parts to the human ear. The outer ear, that collects sound, the middle ear (ear drum, ear bones, cochlea) that conducts sound and sends the messages to the brain and the inner (semicircular canals) hear that helps you keep your balance and sense of proprioception, where you are in space. ear anatomy

 

 

 

 

Your tongue has taste buds and your nose has receptors that send chemical messages to your brain so you can interpret taste and smell. These two senses work together.

taste and smell