Question:

Malpighian tubules are :

Updated On: Jul 28, 2022
  • excretory organs of insects
  • excretory organs of frog
  • respiratory organs of insects
  • endocrine glands of insects
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The Correct Option is A

Solution and Explanation

Malpighian tubules are the excretory organs of insects. It opens at the junction of midgut and hindgut (ileum) in cockroach. Malpighian tubules absorb excretory substances from haemolymph and fat bodies and pass into the proctodaeum- The excretory product of insects is uric acid related with ,, water conservation. These tubules are concerned with homeostasis, osmoregularion and excretion. Respiratory organ of insects is tracheae, which opens outside by ten pairs of spiracles, present in thoracic (2 pairs) and abdominal (8 pairs) parts. Endocrine glands of insects consist of corpora allata, corpora cardiaca and prothoracic gland, which regulate metamorphosis in insects through different hormonal secretion. Excretory organ of frog is kidney (mesonephric), large urinary bladder, excretion ureotelic.
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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