Pulmonary They take it to the lungs for oxygenation. In foetuses there are also umbilical arteries which carry deoxygenated blood. All other arteries carry blood after it has been oxygenated.
In a normal human body, the total number of red blood cells is
A. 15 trillion B. 20 trillion C. 25 trillion D. 30 trillion
The first successful heart transplant from what animal to an adult human was made in Baltimore, Maryland, US, in January 2022?
