Ainda não temos significados para "first gill".
1From the first gill-cleft is formed the tympanic cavity of the ear.
2In these nothing is left but a relic of the first gill-cleft.
3The outlying remainder of the first gill-cleft is the rudiment of the external meatus.
4Above at the basis a small process grows out of this first gill-arch; this is the upper-jaw process.
5Of the four original gill-arches of the mammals the first lies between the primitive mouth and the first gill-cleft.
6The larval period commences at about the thirty-sixth hour with the perforation of the mouth, first gill-cleft and anus.
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