A drop of blood returning from the big toe would enter the heart through the inferior vena cava.
The inferior vena cava is a blood vessel that is located near the heart, with the aim of receiving the blood that has already traveled through the abdominal cavity and the lower extremities.
- The inferior vena cava originates at the level of the pelvis, when the external iliac vein and the hypogastric vein come together to create a system that collects the blood waste that has already traveled both legs.
- Therefore, together with the superior vena cava and the coronary sinus, they are the ones that carry blood to the right atrium.
Therefore, we can conclude that the superior vena cava collects deoxygenated blood that comes from the abdomen, pelvis, and lower limbs.
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