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Bladder - This is where urine is stored.

Ejaculatory duct - Takes semen from the seminal vesicle to the penis during ejaculation.

Foreskin - The piece of skin which covers the penis and slides back when it becomes erect. Circumcised men will have had their foreskin either partially or fully removed.

Glans - The bell-shaped end of the penis which is full of nerve endings. When stimulated the glans produces sexual pleasure.
Penis - The tube of flesh that a male urinates through and that fills with blood and becomes stiff during an erection.

Prostate gland - A gland which produces a liquid that goes into semen, it's also stimulated during anal sex.

Scrotum - The sack of skin which contains the testicles.

Seminal vesicle - Produces most of the fluid that makes up semen.

Testicles - Glands which produce sperm which are stored and mixed with fluid from the seminal vesicle and prostate to produce semen.

Urethral opening - Urine passes from the bladder, down the urethra and out of the urethral opening when a male urinates, semen also leaves the body here when a male ejaculates.

Vas Deferens - The tube which takes sperm from the testicles to the seminal vesicle.