Define human excretory system
Answers
Answer:
Explanation:
The systems that excrete wastes from the body. For example, the system of organs that regulates the amount of water in the body and filters and eliminates from the blood the wastes produced by metabolism. The principal organs of the excretory system are the kidneys, ureters, urethra, and urinary bladder.
Answer:
Human excretory system - The excretory system is a biological system that removes waste materials from the body fluids of an organism. It helps to maintain the chemical homeostasis ( balance or stable equilibrium) and protect the body from damage.
Explanation:
Human excretory system - The human excretory system comprises of a pair of kidneys, a pair of ureters, a urinary bladder and a urethra.
1. Kidneys - There is a pair of kidneys which are dark-red, each with bean-shaped with a notch, the hilus is present on its inner side. The blood vessels, ureter enter or leave the kidney through hilus. Each kidney is about 5 cm wide and 3 cm thick. In adult male the weight of the kidney is 150 gms and in the adult female, it weighs about 135 gms. They are situated in the anterior part of the abdomen protected by the pair of floating ribs (last two ribs). The left kidney is slightly lower than the left kidney.
2. Ureters - The ureters of each kidney leaves from the renal pelvis in hilus region. They are narrow tubular structures that connect the kidney to the urinary bladder. The length of each ureter is about 20 to 30 cm.
3. Urinary bladder - It is a pear-shaped muscular structure having inner linings made of transitional epithelium. The well developed muscular layer of the urinary bladder is called detrusor muscle. The urinary bladder has three openings - two openings to which ureters are connected and one opening connected to the urethra.
4. Urethra - The urethra is a canal-like structure that extends from the neck of the bladder. In females, the length of the urethra is short (about 4cm) and carries only urine. In males, the urethra is much longer (about 20cm) and carries both urine and semen.
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