Why do biceps bulge? VOCAB
A large muscle in the upper arm.
Biceps
Cornea
Energy that comes from sources like the Sun and lamps and makes it possible to see.
Light
A part of the body that receives, processes, and responds to signals from nerves.
Brain
To take something apart to study it
Dissect
The hard parts inside many animals that help give their bodies shape.
Bones
A clear object that changes the direction of light as it passes through
Lens
active mostly at night
Nocturnal
something you see that tricks your eyes or confuses your brain
optical illusion
A test used to discover new information about a question.
Experiment
A part of the body where two bones come together and can bed.
Joint
The colored part of the eye that is shaped like a donut.
Iris
When light bounces off something
Reflect
Nerves
To pay close attention to something.
Observe
A part of the body that attaches to the bones and allows the body to move.
Muscle
The dark opening in the center of the eye.
Pupil
the ability to see
Vision
The brain and all the nerves in the body
Nervous System
All the bones of an animal, including humans
Skeleton
A part of the body that attaches muscle to bone.
Tendon
The back of the eye that senses light and sends messages to the brain.
Retina
A pretend version of something that scientists use when the real thing is too big, small, or complicated to work with
Model
The parts of the body that carry signals from the senses (eyes, ears, nose, mouth, skin) to the brain
Sensory Nerves
What something does
Function