___________ regulates and controls the amount of light entering the eye.
A. Iris
B. pupil
C. cornea
D. retina
Select your answer:
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Animal Genetics and Nutrition The Ear Corona Renal and Gastrointestinal System Motor Neuron Disease Healthcare Delivery Systems and Insurance Cells Eye Cardiac & Diseases of Blood Flow Molecular Genetics Integrated Science Confusion, Dementia, & Alzheimers Disease 3M Micropara Bonding and the Periodic Table HCMA - Hematology Chest, Back, AbsOther quiz:
Living Organisms › ViewWhat is one way the respiratory system and the circulatory system work together in the human body?
A. The circulatory system takes in nutrients, while the respiratory system delivers oxygen.
B. The circulatory system takes in water, and the respiratory system takes in carbon dioxide.
C. The respiratory system takes in nutrients, while the circulatory system delivers carbon dioxide to the cells of the body.
D. The respiratory system takes in oxygen, and the circulatory system delivers the oxygen to the cells of the body.
Anatomy and Histology › View
How many skeletal muscles does the human body contain approximately?
A. 100
B. 400
C. 200
D. 300