The opening of urinary bladder is guarded by two urethral sphincter, which one is involuntary in function

Openings of ureters in the bladder is guarded by

The urinary bladder opens into

During micturition, the urinary bladder …………. and the urethral sphincters ………..

The urinary bladder of frog opens into

Which is urinary bladder of child in womb?

Which is urinary bladder of child in womb?

Consider the following statement each with two blanks. (i). Annelids have (1).____and insects have (2).____for excretion. (ii). Blood enters the glomerulus via (3)._____arteriole and leaves via (4).____arteriole (iii). During micturition the urinary bladder (5)._____ and the urethral sphincters (6).______ Which one of the following options correcty fills the blanks in any two of the above statements?