Bone: The hard, rigid form of connective tissue constituting most of the skeleton of v â¦ ertebrates, composed chiefly of calcium salts.Cartilage: Tough, elastic, fibrous connective tissue that is a major constituent of embryonic and young vertebrate skeletons.
People with the blood type AB are in the greatest demand for plasma donation. Though they make up just 4 percent of the population, their plasma is universal, which means it can be used by anyone. At noncommercial donation sites, people can donate plasma every 28 days, up to 13 times a year. To learn more about donating blood, visit the American Red Cross website.
Giving whole blood requires a waiting period of 56 days between donations; however, all we ask is for individuals to Commit for Life and donate once every quarter. If you donate plasma (your red cells are returned to you), you may donate every 28 days. If you donate platelets (your red cells and most of your plasma are returned to you), you may donate every seven days, with a maximum of 24 times per year.