Is sperm made by blood?

Sperm is not made by blood. Sperms originate from premordial germ cell formed in the epiblast in the second week of development and move to the walls of the yolk sac. During the 4th week they migrate from the walls of the yolk sac towards the developing gonads where they arrive by the end of the 5th week. read more

Sperm is made of sperm. Sperm are single cells with half the DNA of a regular cell (half the chromosomes). Semen is the fluid sperm are carried in. It is made of sperm cells, water, vitamins, protein, enzymes, and fructose that feeds and protects sperm cells as they travel. read more