What carries oxygenated and deoxygenated blood?
About Circulation of the Blood. Systemic circulation carries oxygenated blood from the left ventricle, through the arteries, to the capillaries in the tissues of the body. From the tissue capillaries, the deoxygenated blood returns through a system of veins to the right atrium of the heart.
The Arteries will thus carry OXYGENATED BLOOD relative to veins with deoxygenated blood. Unless they are the PULMONARY arteries/veins. The Pulmonary artery takes deoxygenated blood from the right side of the heart to pick up oxygen in the lungs.
- In normal conditions, the pulmonary valve prevents regurgitation of deoxygenated blood from the pulmonary artery back to the right ventricle. The artery carrying blood from the right ventricle of the heart to the lungs for oxygenation. Note: This is the only artery in the body that carries deoxygenated blood.
- Arteries carry oxygenated blood away from the heart to the tissues, except for pulmonary arteries, which carry blood to the lungs for oxygenation (usually veins carry deoxygenated blood to the heart but the pulmonary veins carry oxygenated blood as well).
- Capillaries are the smallest blood vessels and their walls are only one cell thick which allows diffusion between the blood and cells to occur. Nutrients and oxygen from the blood diffuses through the capillary walls into the tissues that need it.
The inferior vena cava carries Veins carry the deoxygenated blood from different parts of the body to the heart. Among the veins, only pulmonary vein carries oxygenated blood (from lungs to left atrium). Among the 5 main vessels of our body, veins carry deoxygenated blood.
- The dural sinuses receive blood from the veins that drain the brain and skull. Formed at the base of the brain from the inferior petrosal sinus and the sigmoid sinus, the internal jugular vein runs down the side of the neck adjacent to the internal carotid artery.
- Vein. Veins are blood vessels that carry blood toward the heart. Most veins carry deoxygenated blood from the tissues back to the heart; exceptions are the pulmonary and umbilical veins, both of which carry oxygenated blood to the heart. In contrast to veins, arteries carry blood away from the heart.
- Deoxygenated blood is then pumped by the right ventricle to the lungs via the pulmonary artery which is divided in two branches, left and right to the left and right lungs respectively. Blood is oxygenated in the lungs and returns to the left atrium through the pulmonary veins.
The right and left atria are the top chambers of the heart and receive blood into the heart. The right atrium receives deoxygenated blood from systemic circulation and the left atrium receives oxygenated blood from pulmonary circulation.
- The heart consists of four chambers in which blood flows. Blood enters the right atrium and passes through the right ventricle. The right ventricle pumps the blood to the lungs where it becomes oxygenated. The oxygenated blood is brought back to the heart by the pulmonary veins which enter the left atrium.
- Deoxygenated blood passes through these blood vessels, valves and parts of the heart:
- Vena cava.
- Right atrium.
- Right ventricle.
- Pulmonary artery.
- The exception to this rule is found in the pulmonary arteries, which carry deoxygenated blood away from your heart to your lungs, where it will become oxygenated before returning to your heart through the pulmonary veins.
Updated: 3rd December 2019