Renal calculi are formed due to
- accumulation of calcium oxalate crystals
- clotting of blood
- presence ()f hard particles in food
- all of the above
The Correct Option is A
Solution and Explanation
Top Questions on excretory system
- Given below are two statements:
Statements I: Concentrated urine is formed due to counter current mechanism in nephron.
Statement II: Counter current mechanism helps to maintain osmotic gradient in the medullary interstitium.
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Column I Column II a 6- 15 pairs of gill slits i Trygon b Heterocercal caudal fin ii Cyclostomes c Air Bladder iii Chondrichthyes d Poison sting iv Osteichthyes - NEET (UG) - 2020
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Concepts Used:
Excretory System
Excretory System Organs:
The human excretory system organs include:
- A pair of kidneys
- A pair of ureters
- A urinary bladder
- A urethra
Read More: Excretion in Human Beings
Kidneys:
The organ that has an inner concave structure is the kidney. The blood vessels, nerves, and ureters enter the kidneys through the hilum, which is a notch in the inner concave surface of the kidney. The renal pelvis, a large funnel-shaped space, present inside the hilum, has many projections, called calyces.
Ureter:
A pair of thin muscular tubes called the ureter comes out of each kidney outstretched from the renal pelvis. It is the carrier of urine from the kidney to the urinary bladder.
Urinary Bladder:
It is a muscular sac-like structure, where urine is stored. The urinary bladder is being emptied by the process of micturition, which acts as urination.
Urethra:
This tube rises from the urinary bladder and helps to throw urine out of the body. In males, it works as the common route for sperms and urine. Sphincter muscles guard the opening of the urethra.
Read More: Excretion