Interconversion of amino acid is a function of ______.

The GI tract is about _______ meters long.

The outermost layer in the wall of the GI tract.

Amylase helps in the digestion of __________. 

Phagocytic cells in lung alveoli: 

Lipid metabolism is a function of __________. 

The volume of air that we can expel forcibly above the tidal volume: 

Renal cortex is a part of parenchyma.

The innermost layer of tissues on the external surface of kidneys: 

Each kidney contains about _______ million nephron.