Explanation

About 40-50% of the body's weight is due to muscles.

Muscles are the largest component in terms of body mass after bones.

The remaining body weight is distributed between bones, skin, organs, and other tissues.

Explanation

Explanation

The midbrain controls the reflex actions of the eye, including the adjustment of the pupil size in response to light.

This function helps regulate the amount of light entering the eye to protect the retina and maintain clear vision.

Explanation

Stomach wall secretes pepsin, which begins protein digestion.

Pancreas releases trypsin and chymotrypsin into the small intestine to further break down proteins.

Explanation

When functioning at its best, the human nose can distinguish between 4,000 and 10,000 different odors.

This range varies by individual sensitivity, genetic factors, and exposure to different smells.