'Students know that this black opening in the center of the eye controls the amount of light that enters'
pupil
BODY LANGUAGE: Students know that this black opening in the center of the eye controls the amount of light that enters
Students know that this black opening in the center of the eye controls the amount of light that enters
Students know that this black opening in the center of the eye controls the amount of light that enters
BODY LANGUAGE
pupil
BODY LANGUAGE