<P> The snake 's heart is encased in a sac , called the pericardium , located at the bifurcation of the bronchi . The heart is able to move around , however , owing to the lack of a diaphragm . This adjustment protects the heart from potential damage when large ingested prey is passed through the esophagus . The spleen is attached to the gall bladder and pancreas and filters the blood . The thymus is located in fatty tissue above the heart and is responsible for the generation of immune cells in the blood . The cardiovascular system of snakes is also unique for the presence of a renal portal system in which the blood from the snake 's tail passes through the kidneys before returning to the heart . </P>
<P> The snake 's heart is encased in a sac , called the pericardium , located at the bifurcation of the bronchi . The heart is able to move around , however , owing to the lack of a diaphragm . This adjustment protects the heart from potential damage when large ingested prey is passed through the esophagus . The spleen is attached to the gall bladder and pancreas and filters the blood . The thymus is located in fatty tissue above the heart and is responsible for the generation of immune cells in the blood . The cardiovascular system of snakes is also unique for the presence of a renal portal system in which the blood from the snake 's tail passes through the kidneys before returning to the heart . </P>
where is the heart located in a snake
where is the heart located in a snake
at the bifurcation of the bronchi
at the bifurcation of the bronchi