why do birds have an anus and not a urethra?

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2006-10-22 04:46:51 · 2 answers · asked by Vancouver Island Marmot 1 in Science & Mathematics ➔ Zoology

It is not an anus, it is a cloaca, through which urine, feces and eggs are expelled.

2006-10-22 04:50:03 · answer #1 · answered by finaldx 7 · 0⤊ 0⤋

Because they are descended from reptiles ( a type of dinosaur as a matter of fact) which have a similar "arrangement" i.e. a cloaca.

2006-10-22 04:55:56 · answer #2 · answered by Anonymous · 0⤊ 0⤋