Nervous System

Front 1

arachnoid mater
d.A.p

Back 1

1 of 3 membranes that cover the brain and spinal cord. it is between the other to layers. it is delicate and spider web like. cerebrospinal fluid flows underneath this membrane.

Front 2

axon

Back 2

is the long skinny part of a nueron and sends electrical impulses away from the cell body.

Front 3

cell body

Back 3

is the largest part of the cell and holds all of the general parts of a cell including the nucleus which is the control center of the cell. the cell body has structures that help make energy and get rid of cellular wastes.

Front 4

cerebellum

Back 4

is locate under the cerebrum and is responsible for balance movement and coordination.

Front 5

cerebrospinal fluid

Back 5

protect nerve tissue and keeps it healthy removes waste and the brain floats in it its is between a and p in D.A.P. it also fills special spaces in the brain and spinal cord

Front 6

cerebrum

Back 6

is the largest and most complex part of the brain it consists of the cerebrum it controls intelligence, speech, emotion, and ability to feel and move

Front 7

crainium

Back 7

skeletal system that holds the brain

Front 8

dendrites

Back 8

are the long thin parts of the neurons. one neuron can have more than 100 dendrites. dendrites receive nerve messages and carry the signals to the cell body.

Front 9

dura mater
D.a.p.

Back 9

protectant outermost layer of the brain

Front 10

medulla

Back 10

along with the pons make up the brain stem it coordinates all of the brain messages and controls breathing heart rate blood pressure swallowing digestion and blinking.

Front 11

stpes

Back 11

small bone in middle eat which is attached incus and fenesra ovalis. it is the smallest/lightest bone in the body. transfers sound waves to the cochlea

Front 12

middle ear

Back 12

in between eardrum and oval window of the cochlea the middle ear contains three tiny bones Main ting is it transfers sound waves to cochlea

Front 13

semicircular canals

Back 13

are connected to the cochlea they are filled with fluid that moves triggering nerve messages making you aware of your position.

Front 14

sound waves

Back 14

are created when noises cause air molecules to vibrate. when they reach they tympanum it vibrates the three tiny bones that transfer the vibration to the cochlea. the vibrations are turned into a nerve signal which is carried to the brain by the auditory nerve.

Front 15

pinnae

Back 15

structures on the side of the head which funnel sounds into the auditory canal

Front 16

noise pollution

Back 16

a loud constant noise that disrupts balance of human activity
ex:cars planes dogs power tools lighting hum

Front 17

distance vision

Back 17

allows you to see objects twenty feet or more from the viewer

Front 18

peripheral vision

Back 18

allows you to see to the sides with out turning your head bad in humans

Front 19

pupil

Back 19

entrance to the inside of the eyeball it lets the light into your eyes. iris controls the size of it the bigger the more light.

Front 20

retina

Back 20

lines in the back of the eye made of receptor cells that are sensitive to light it converts to nerve messages

Front 21

iris

Back 21

colored part of the eye that has muscle fibers that contract to control the size of the pupil

Front 22

cornea

Back 22

is the tough transparent outer layer that protects the front of the eye.

Front 23

lens

Back 23

small disk made of clear living cells it is held in place by muscles that contract and relax to flatten or bulge the lens. controls your ability to see near or far

Front 24

optic nerve

Back 24

attached at the back of the eyeball. it receives light messages from the retina and sends them to the brain

Front 25

tapetum

Back 25

reflective layer in the back of the eye of some animals it helps animals with night vision

Front 26

choroid

Back 26

is the layer of the eye between the retina and sclera it is made of blood vessels that nourish the back of the eye

Front 27

light pollution

Back 27

is excessive or disrupted artificial light. It disrupts ecosystems and has adverse health effects. Since the early 1980 a global dark sky movement has emerged with concerned people campaining to reduce the amount of light pollution. like other pollution (air water noise) light pollution causes damage to the environment.