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.
  Most plasma centers offer between $20-$40 dollars per donation depending on the center preference. Plasma centers pay for you to donate plasma because it is a longer pro â¦ cess than donating blood. With whole blood (which is what places like the Red Cross collect), it takes about fifteen minutes to donate.