Page 28 - Human anatomy COMPLETELY DONE1

From the left ventricle, arterial blood is pushed into the aorta and then goes
through smaller arteries to all organs of the body.
After giving oxygen to organs and tissues and taking carbon dioxide from them,
venous blood returns to the heart through the upper and lower vena cava, which flow
into the right atrium.
Venous blood is pushed out of the right ventricle into the pulmonary artery. This
blood flows into the lungs, where carbon dioxide is released from it, and oxygen enters
it. In the lungs, venous blood turns into arterial blood.
Arterial blood enters the left atrium through the pulmonary veins.
The movement of blood from the left ventricle to the right atrium is called the
great circle of blood circulation. Movement from the right ventricle to the left atrium
is small (figure 17).

Figure 17. Blood circulation

Vascular structure, gas exchange and lymph outflow.
The vessels coming out of the heart and flowing into it are large, have a large

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