Answer:A girl's urethra is much shorter and straighter than a boy's, so it can be contaminated fairly easily.
Step-by-step explanation:
Urethra is a tube that passes urine from the bladder to the outside of the body.
Sphincter muscles keep the urethra shut closed until there is a need to excrete urine.
Urethra is connected to the reproductive structure,in the male urethra is almost 20 cm long and it goes through the male organ before excretes urine that means it extends longer considering the male organ is longer.
Considering this we can see how short then the female one is because of the female organ that doesn't extend that long and it is very closely connected to the behind hole that excretes wastes which usually carry bacteria that causes easily infection in woman.