The posterior vena cava, also called the caudal vena cava, is the large vein that collects blood from the caudal half of the animal and delivers it to the right atrium. The caudal vena cava provides venous drainage to the hind limbs, reproductive tract and digestive tract.
In human's ... there ain't none.
It is a vein that carries blood from the lower body to the heart, also known as the posterior vena cava.
the heart
The posterior vena cava and the aorta work together to move blood to and from the lower half of the body.
heart
The heart chamber that the superior and posterior vena cava opens to on a fetal pig is the right atrium. The opening to both vena cava's are valveless.
The function of the vena cava is to return blood back to the heart.
Posterior Vena Cava in a fetal pig, Inferior Vena Cava in humans
Through Superior vena cava & inferior vena cava . The blood from anterior part of the body is taken to heart through superior vena cava,the blood from posterior part of the body is taken through inferior vena cava.
The inferior vena cava (or IVC), also known as the posterior vena cava, is the large vein that carries de-oxygenated blood from the lower half of the body into the right atrium of the heart.It is posterior to the abdominal cavity and runs alongside of the vertebral column on its right side (i.e. it is a retroperitoneal structure). It enters the right atrium at the lower right, back side of the heart.
The right and left common Iliac Vein merge to form the inferior vena cava
superior vena cava
Superior Vena Cava takes blood from the head, neck and arms, and pumps it into the right atrium.