Platelets (thrombocytes): These cell components are formed from pieces of cells found in the bone marrow called megakaryocytes. Ticks, leeches, feminine mosquitoes, vampire bats, and an assortment of other pure creatures do take in the blood of other animals, but only bats are affiliated with vampires. This has no https://www.youtube.com/watch?v=buIHtQY7fCU