Name: Digestion and Excretion
Uploaded: 2019-07-19
Duration: 21 min 59 s
Description: There are seven basic processes in life. Digestion and excretion are examples of these processes. Learn more about these processes in this video.

Question

Draw a well-labelled diagram of the human excretory system and explain it.

Accepted Answer

In humans, the excretory system helps in the elimination of the nitrogenous wastes. It comprises the following structures:

Kidneys: Kidneys are the main organ of the human excretory system. Also, every individual has a pair of kidneys. They are located one on each side of the spine at the level of the liver. Kidneys are divided into three regions. Namely, the renal cortex which is the outer layer. Next, the renal medulla which is the inner layer. And lastly, the renal pelvis which carries the urine from the kidney to the ureter.

Ureters: There is one ureter that comes out of each kidney as an extension of the renal pelvis. It is a thin muscular tube that carries urine from the kidneys to the bladder.

Urinary bladder: The bladder is a sac-like structure. Made up of a smooth muscle layer that lines it. It stores the urine until micturition. Furthermore, micturition is the act of expelling urine from the body. The bladder receives urine from the ureters, one from each kidney.

Urethra: The urethra is a tube that arises from the urinary bladder. Its function is to expel the urine outside by micturition. In addition, it is shorter in females and longer in males. Furthermore, in males, it functions as a common path for sperms and urine. Also, sphincter guards the opening of the urethra.

Draw a well-labelled diagram of the human excretory system and explain it.

Important Questions on The Human Body-Excretory System

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