sentence: Human sperm is made in the testicles of a man.
sentences_after: Human sperm contains 23 chromosomes. A human needs 46 chromosomes, so a sperm cell is called a 'haploid' as it only has half. The other half is contained within the ovum or egg of a female. During sex, semen is shot out of the man's penis during ejaculation.
concept_name: human sperm
headings: Sperm In humans
categories: Biological reproduction Human sexuality