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teens.webmd.com/boys/testicles-faq

Testicles, also called testes or balls, are oval-shaped organs that sit in a sac that hangs behind the penis.. The main job of testicles is to make and store sperm and produce testosterone.Testosterone is the male hormone that's responsible for the changes that occur during puberty.

www.healthline.com/health/human-body-maps/testis

The testes — also called testicles — are two oval-shaped organs in the male reproductive system. They’re contained in a sac of skin called the scrotum.The scrotum hangs outside the body in ...

en.wikipedia.org/wiki/Testicle

Testicle or testis is the male reproductive gland or gonad in all animals, including humans. It is homologous to the female ovary. The functions of the testes are to produce both sperm and androgens, primarily testosterone.

www.emedicinehealth.com/understanding_the_male_anatomy/article_em.htm

The testes have two main functions, to produce sperm (the male reproductive cell), and to produce testosterone (the male sex hormone). The epididymides and the vasa deferentia are attached to the testicles and are important in transporting sperm cells after they develop in the testes.

www.innerbody.com/image_endoov/repo10-new2.html

The testes (singular: testis), commonly known as the testicles, are a pair of ovoid glandular organs that are central to the function of the male reproductive system. The testes are responsible for the production of sperm cells and the male sex hormone testosterone.

medlineplus.gov/testiculardisorders.html

Testicles, or testes, make male hormones and sperm. They are two egg-shaped organs inside the scrotum, the loose sac of skin behind the penis. It's easy to injure your testicles because they are not protected by bones or muscles.

www.yourhormones.info/glands/testes

The testes, also known as testicles or male gonads, lie behind the penis in a pouch of skin called the scrotum. The testes move freely in the scrotum but each testis is attached to the body wall by a thin cord called the spermatic cord, which passes through a cavity in the pelvis and into the abdomen.

www.webmd.com/sex-relationships/guide/male-reproductive-system

Unlike the female reproductive system, most of the male reproductive system is located outside of the body. These external structures include the penis, scrotum, and testicles. The body of the ...

www.plannedparenthood.org/.../what-are-parts-male-sexual-anatomy

What are the parts of the male internal sexual anatomy? The internal parts of male sex anatomy are made up of: Testicles The testicles are 2 ball-like glands inside your scrotum. They make sperm and hormones like testosterone. Epididymis The epididymis is a tube where your sperm matures. It connects each testicle to each vas deferens.

www.mayoclinic.org/symptoms/testicle-pain/basics/causes/sym-20050942

Testicle pain has a number of possible causes. The testicles are very sensitive, and even a minor injury can cause testicle pain or discomfort. Testicle pain might arise from within the testicle itself or from the coiled tube and supporting tissue behind the testicle (epididymis).