Definition that contains sperm cell
- homunculus a tiny fully formed individual that (according to the discredited theory of preformation) is supposed to be present in the sperm cell
- psa a protein manufactured exclusively by the prostate gland; PSA is produced for the ejaculate where it liquifies the semen and allows sperm cells to swim freely; elevated levels of PSA in blood serum are associated with benign prostatic hyperplasia and prostate cancer
- acrosome a process at the anterior end of a sperm cell that produces enzymes to facilitate penetration of the egg
- prostate specific antigen a protein manufactured exclusively by the prostate gland; PSA is produced for the ejaculate where it liquifies the semen and allows sperm cells to swim freely; elevated levels of PSA in blood serum are associated with benign prostatic hyperplasia and prostate cancer
- flagellum a lash-like appendage used for locomotion (e.g., in sperm cells and some bacteria and protozoa)