Front

What structure in the eye changes the size of the pupil?

Back

Iris

Front

How many lobes does each lung have?

Back

Left: 2; Right: 3

Front

What carries blood away from the heart?

Back

Arteries

Front

What is the nerve cell called?

Back

Neuron

Front

Where does gas, nutrient, and waste exchange occur in the body?

Back

Capillaries

Front

What is the function of the cornea?

Back

The cornea helps to focus light onto the retina.

Front

What is the role of the lens in the eye?

Back

The lens adjusts its shape to help focus light on the retina.

Front

What are veins responsible for?

Back

Veins carry blood back to the heart.

Front

What is the function of arteries?

Back

Arteries carry oxygenated blood away from the heart.

Front

What is the myelin sheath?

Back

The myelin sheath insulates nerve fibers to speed up signal transmission.