a nucleotide found in muscle cells and important in metabolism; reversibly convertible to ADP and ATP

a nucleotide found in muscle cells and important in metabolism; reversibly convertible to ADP and ATP

a nucleotide found in muscle cells and important in metabolism; reversibly convertible to ADP and ATP

a nucleotide found in muscle cells and important in metabolism; reversibly convertible to ADP and ATP

a nucleotide found in muscle cells and important in metabolism; reversibly convertible to ADP and ATP

a nucleotide found in muscle cells and important in metabolism; reversibly convertible to ADP and ATP

a bundle of modified heart muscle that transmits the cardiac impulse from the atrioventricular node to the ventricles causing them to contract

a bundle of modified heart muscle that transmits the cardiac impulse from the atrioventricular node to the ventricles causing them to contract

tubular passage of mucous membrane and muscle extending about 8.3 meters from mouth to anus; functions in digestion and elimination

tubular passage of mucous membrane and muscle extending about 8.3 meters from mouth to anus; functions in digestion and elimination