Skeletal System
Another name for the human skull
What is cranium
These are muscles that you can control
What are voluntary muscles
The main nerve pathway to the brain
What is the spinal cord
Colored part of the eye
Iris
The spinal column is made of these stacked bones
What is vertebrae
These are muscles that you can't control
What are involuntary muscles
What sends messages from the spinal cord to the brain
What are nerves
Center black part of the eye
Pupil
What helps us to take a picture of a bone to see if it's broken
what are x-rays
How much of the body's weight comes from muscle?
What is half
A super quick reaction from a nerve
What is a reflex
Messages from the eye travel down the _______ nerve
What is optic
The number of bones in an adult human skeleton
What is 206
What makes our bones move?
What is muscles
Nerves carry these to the brain
What are messages
Where does the retina send the message it gets?
The brain
What cells pump out red blood cells
Bone marrow cells
What muscle pumps blood throughout your body?
What is the heart
Nerves work with five of these to get information from our eyes, ears, nose, mouth, and touch
What are the 5 Senses
Does the eye actually "see" objects?
No, it sees light reflected off objects