Why do your biceps bulge?
A large muscle in the upper arm
bicep
The clear layer in FRONT of the eye
cornea
Sleeps during the day and is active mostly at night
A part of the body that receives, processes, and responds to signals from nerves
brain
The brain and all of the nerves in the body
nervous system
The hard parts inside many animals that help give their bodies shape
bones
Iris
the colored part of the eye that is shaped like a donut
When light bounces off something
reflect
Illusion
something that tricks or confuses your brain
To pay close attention to something
observe
A part of the body where two bones come together and can bend.
joint
A clear object that changes the direction of light as it passes through
lens
The ability to see
vision
Motor nerves (movement nerves)
the parts of the body that carry signals from the brain to muscles
all of the bones of an animal, including humans
skeleton
A pretend version of something that scientists use when the real thing is too big, small, or complicated to work with
model?
pupil
the dark opening in the center of the eye
A test used to discover new information about a question
experiment
nerves
the parts of the body that carry signals from one part of the body to another party
A group of things that affect each other and function as a whole
system
a part of the body that attaches to bones and allows the body to move
muscle
retina
dissect
The parts of the body that carry signals from the senses (eyes, ears, mouth) to the brain
sensory nerves
What something does
function