blood returning to the heart from the upper portion of the body enters the right atrium through the superior vena cava.
Inferior vena cava
vena cava
Aorta
Dilation of a blood vessel is the term for physiologic widening of the vessel. Abnormal widening of the blood vessel through a weakening of the wall is known as aneurysm.Dilation of a blood vessel means widening of the vessel.
The Systemic aorta is the major blood vessel that brings back blood to heart from most body parts.
Lumen
Carrys Blood Through The Body
Capillaries is the answer in this question
A blood vessel is a tube shaped organ that carries blood. It carries the blood through the tissues and organs of the human body.
The dorsal blood vessel is located on top of the intestinal track in a worm.
Aorta
Yes, the capillaries are the smallest kind of blood vessel, that facilitate the movement of substances (like oxygen and glucose) in and out of the blood through their very thin walls.