Let’s learn about the external and internal parts of the biological male anatomy.
Male external anatomy
Penis: You may have grown up calling it something else, but the formal English term is penis. The penis can be different colours, shapes and sizes. The penis can either be circumcised (when the foreskin is removed) or uncircumcised. Both are normal.
Foreskin This is the fold of skin which can cover the head of the penis. The foreskin is sometimes removed for cultural, religious or medical reasons. This is called circumcision.
Urethral opening: This is the opening of the tube that carries urine (wee) and semen (cum).
Scrotum: The scrotum (sack) holds two small oval-shaped organs called testes (balls). During puberty, testes grow bigger and start to make sperm. It is normal to have one testis that is a little bit larger than the other and hangs a little bit lower than the other.
Male internal anatomy
Testis / testicle: There are two testicles in the scrotum. They produce sperm and the male sex hormone, testosterone. Testosterone is the main hormone in males that causes changes in puberty. Testicles are sensitive, so boys should wear well-fitting underwear, especially during sports.
Urethra: The tube that carries urine (wee) and semen (cum).
Bladder: The bladder holds urine and is shaped like a sac.
Anus: The hole in the bottom (bum) that allows faeces (poo) to pass outside the body. Males and female bodies have an anus.
Scrotum: The sac of skin around the testes/testicles.
Penis: The male sex organ through which urine and semen pass. When a man is sexually aroused (turned on), his penis becomes stiff (erection) and ejaculation of semen may happen.
Prostate: Makes most of the fluid that makes up semen.