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study guide

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Across
1
Transfers sound into electrical infomation
4
Place where tears are made
6
When you head gets hit hard and your axons rip apart
7
Male reproductive cell
13
Nervous system that controls voluntary movements
16
Where you take in and release air
18
Organ system that allows you to feel your surroundings
19
Organ that pumps blood to body
20
Female reproductive cell
Down
2
The flap that control where air goes and where food goes
3
The organ that changes blood with low oxygen into oxygen rich blood
5
Keeping a normal environment inside the body
8
The tube that the egg gets fertilized in
9
The nerve that sends signals from the eye to the brain
10
The main highway for nerves
11
Hammer, stirrup, and anvil
12
The windpipe
14
Hole in the eye
15
Keeps blood flowing in the same direction
17
When the sperm and egg first meet it is called ________