Organs

An organ is a structure made of two or more tissues that work together to perform a specific job — such as the kidneys filtering blood or the thyroid gland producing hormones.

About organs

Gray's Anatomy (1918) describes the major viscera of the abdomen, pelvis, and neck — kidneys, spleen, thyroid, adrenal glands, and the reproductive organs — noting the position, shape, and relations of each.

Answers in this topic

Questions

What are the kidneys?
A pair of bean-shaped organs.
What is the bladder?
A hollow, muscular sac.
What are the ureters?
A pair of narrow, muscular tubes about 25-30 cm long.
What is the urethra?
A tube that carries urine from the bladder to outside the body.
What is the spleen?
A soft, purplish organ about the size of a fist.

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Last verified: 2026-07-18

  • Best Anatomy Answers is an educational reference about human anatomy. It is not medical advice — for any health concern, talk to a licensed medical professional.

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