Question

How does oxygen reach the different parts of the body from the lungs?

Answer 1

oxygen reaches to different parts of our body by hemoglobin converts into oxyhemoglobin and provides to all parts by traveling into the blood

Answer 2

oxygen is transport through the capillaries pesent in the alveoli in lungs.
this capillaries is connect to pulmonary artery and oxygenate it through the blood these blood goes in the heart and pump blood( which carry oxygen) through all part of the body.

The human circulatory system functions to transport blood and oxygen from the lungs to the various tissues of the body. The heart pumps the blood throughout the body. The lymphatic system is an extension of the human circulatory system that includes cell-mediated and antibody-mediated immune systems. The components of the human circulatory system include the heart, blood, red and white blood cells, platelets, and the lymphatic system.

$The human heart is about the size of a clenched fist. It contains four chambers: two atria and two ventricles. Oxygen-poor blood enters the right atriumthrough a major vein called the vena cava.The blood passes through the tricuspid valve into the right ventricle. Next, the blood is pumped through the pulmonary artery to the lungs for gas exchange. Oxygen-rich blood returns to the left atrium via the pulmonary vein. The oxygen-rich blood flows through thebicuspid (mitral) valve into the left ventricle, from which it is pumped through a major artery, the aorta. Two valves called semilunar valves are found in the pulmonary artery and aorta. The ventricles contract about 70 times per minute, which represents a person’s pulse rate. Blood pressure, in contrast, is the pressure exerted against the walls of the arteries. Blood pressure is measured by noting the height to which a column of mercury can be pushed by the blood pressing against the arterial walls. A normal blood pressure is a height of 120 millimeters of mercury during heart contraction (systole) and a height of 80 millimeters of mercury during heart relaxation (diastole). Normal blood pressure is usually expressed as “120 over 80.” Coronary arteries supply the heart muscle with blood. The heart is controlled by nerves that originate on the right side in the upper region of the atrium at the sinoatrial node. This node is called thepacemaker. It generates nerve impulses that spread to the atrioventricular node, where the impulses are amplified and spread to other regions of the heart by nerves called Purkinje fibers.$