What are the smallest part of the body, often called your "building blocks"?
Cells
A group of cells working together is _______________?
Tissue
Your ______ keep dust and other objects out of your eyes.
eyelids
The brain, the nerves, and the spinal cord make up the ________ system.
nervous
Your whole body is controlled by your _______?
brain
The colored ring of muscles that controls the size of the pupil is the _______.
iris
A bundle of nerves protected by your backbone is your______.
spinal cord
Cells that carry messages to and from the brain are_______.
nerves
skin
touch
smell
nose
taste
tongue
A?
brain
