2006-08-03 03:25:43 · 9 answers · asked by Aroura 3 in Science & Mathematics ➔ Biology
Yes, its true that all animals -- including humans, other mammals, birds, reptiles and fish -- begin undistinguishable from each other at embrionic stages. All have pharyngeal arches, which resemble gills. For fish, these actually become gills. For humans and other animals, these differentiate into structures such as nose and sinus cavities, or close up to form the area we know as the upper lip. Sometimes a "gill arch" fails to close during development. The result is a "cleft palate".
2006-08-03 04:04:15 · answer #1 · answered by gregory_s19 3 · 3⤊ 3⤋
They don't actually have gills. What they have are things that resemble the unformed gills that a fish embryo would have. These proto-gills, for lack of a better word, close to form the Eustachian tube that leads from your ears to your throat.
2006-08-03 03:35:29 · answer #2 · answered by mrodrx 4 · 0⤊ 0⤋
they are called pharyngeal arches, and look like gills. they become normal structures like your mouth and nose and ears and so on.
2006-08-03 03:42:53 · answer #3 · answered by Anonymous · 1⤊ 0⤋
They form into lungs
2006-08-03 03:29:35 · answer #4 · answered by Anonymous · 0⤊ 0⤋
was this some kind of fish-boy. A hybrid perhaps.
2006-08-03 03:30:14 · answer #5 · answered by Wilson Kipketer 2 · 0⤊ 0⤋
They become ears.
2006-08-03 03:33:28 · answer #6 · answered by albert 5 · 0⤊ 0⤋
gregory had it right. his is the best answer.
2006-08-03 04:48:28 · answer #7 · answered by pooh8402 3 · 0⤊ 0⤋
THEY BECOME YOUR CHEEKS
2006-08-03 03:29:35 · answer #8 · answered by helper 6 · 0⤊ 0⤋
HUH?
2006-08-03 03:31:16 · answer #9 · answered by texasgirl5454312 6 · 0⤊ 0⤋