The Loop of Henle is concerned with which of the following systems?

Draw a neat and labelled diagram of an excretory unit (nephron).

The collecting duct of the nephron extends from the cortex of the kidney to the:

Identify the wrong statements about the human excretory system and choose the option accordingly.
$I.$ Kidneys are reddish-brown and bean-shaped structures.
$II.$ Kidneys are situated between the last thoracic and third lumbar vertebrae.
$III.$ Each kidney of an adult human measures $10-12 \, cm$ in length,$5-7 \, cm$ in width,$2-3 \, cm$ in thickness,and has an average weight of $120-170 \, g$.

The glomeruli are confined to the

The correct arrangement of layers of detrusor muscles in the wall of the urinary bladder is . . . . . . .