There are three types of blood vessel: arteries, veins and capillaries. The heart is a muscular organ that pumps blood around your circulatory system. The circulatory system is the heart and all ...

A negative. If you have this rare blood type (like 6.3% of the U.S. population), you can donate blood to anyone with A or AB blood type. B positive. Another rare type, it is found in 8.5% of people.

In so-called wet AMD, new, abnormal blood vessels grow in the central part of the retina called the macula, ...

Additionally, researchers are working to speed up hydrogel's degradation, aiming for it to dissolve within two to three months while the cells mature into functional blood vessels. Dai says this ...