In normal human adult physiology, the CO2 concentration in the right atrium is relatively high (typically 46mmHg). In contrast, after exchange in the lungs, blood entering the left atrium has a CO2 concentration of roughly 40 mmHg.
This will be different in some heart conditions and fetal circulation.
Both! Blood enters the atria (upper chambers) on both sides of the heart at the same time. Blood from the body, carrying carbon dioxide, enters the right atrium. Blood from the lungs, carrying oxygen, enters the left atrium. The two atria contract together, pumping the blood into the two ventricles (lower chambers). The ventricles then contract, pumping blood out of the heart. Blood from the right ventricle goes to the lungs, where it loses its carbon dioxide and picks up oxygen. It then goes to the left atrium. Blood from the left ventricle goes to the body, where it delivers oxygen and picks up carbon dioxide. See: http://www.bbc.co.uk/science/humanbody/body/factfiles/heart/heart.shtml
No. It depends on the concentration of carbon dioxide in the alveoli and the blood. The concentration of carbon dioxide in the capillaries of the alveoli is higher than the concentration of carbon dioxide in the air, so carbon dioxide in the capillaries of the alveoli diffuses out of the capillaries into the alveoli of the lungs and is exhaled.
Oxygen is carried by hemoglobin in red blood cells, forming oxyhemoglobin. Carbon dioxide is carried in the blood mainly in the form of bicarbonate ions, but also as carbaminohemoglobin and dissolved CO2. These gases are exchanged between the blood and tissues in the lungs and other tissues in the body.
The concentration of oxygen in the lungs is higher than the concentration of carbon dioxide. In the alveoli of the lungs, oxygen diffuses into the blood from the air we breathe, while carbon dioxide diffuses out of the blood into the alveoli to be exhaled. This exchange allows for the uptake of oxygen and the removal of carbon dioxide from the body.
External respiration refers to the exchange of oxygen and carbon dioxide between the lungs and the blood in the pulmonary capillaries. This process allows for oxygen to be taken up by the blood and carbon dioxide to be removed from it.
Blood in the right atrium typically contains a high proportion of deoxygenated blood, which is low in oxygen and high in carbon dioxide.
Blood that flows into the right atrium is returning from the body and is deoxygenated. This means that it contains less oxygen and mostlycarbon dioxide.
a little oxygen and a lot of carbon dioxide
a little oxygen and a lot of carbon dioxide
Coronary veins carry deoxygenated blood with carbon dioxide away from the heart muscle and back to the right atrium of the heart.
As blood leaves the right atrium, it proceeds to the right ventricle. From there, it moves into the lungs and exchanges its carbon dioxide for oxygen in preparation for transport around the body.
yes
Venous blood is loaded with carbon dioxide and low in oxygen Arterial blood is rich in oxygen with little carbon dioxide
Deoxygenated blood is low in oxygen and high in carbon dioxide.
The right atrium receives "de-oxygenated" blood (blood from the body containing less oxygen and more carbon dioxide) and the right ventricle sends this blood toward the lungs.
The lung takes carbon dioxide out of your blood and replaces it with oxygen.
The mechanisms for transporting oxygen and carbon dioxide in the blood are the lungs. The blood vessels are also needed for transporting oxygen and dispelling carbon dioxide.