The olfactory pits form from which of the following?

Rickets results in improper bone development in children that arises from the malabsorption of calcium and a deficiency in .

Amino acids are needed to .

The buffer that is adjusted to control acid-base balance is .

Carbonic acid levels are controlled through the .

A patient has been suffering for 2 months with a chronic, watery diarrhea. A blood test is likely to reveal .

The anterior pituitary gland develops from which embryonic germ layer?

Which of the following is unique to cardiac muscle cells?

The right and left brachiocephalic veins .

During gastric emptying, chyme is released into the duodenum through the .