. Evolution and its relation to religious thought . Fig. o7.—a, heart and gill-arches of a fish; b, one arch with fringe (after Owen); H, the heart. course, necessary, for they are the gill-arclies. Thewhole of the blood passes through these arches, to beaerated in the gill-fringes. The use of this peculiarstructure is here obvious enough. If a lizard were eyera fish, and afterward turned into a lizard, changing itsgill-respiration for lung-respiration, then, of course, theuseless gill-arches would remain to tell the story. Now,although a lizard never was a fish, in its individual his-tory or
. Evolution and its relation to religious thought . Fig. o7.—a, heart and gill-arches of a fish; b, one arch with fringe (after Owen); H, the heart. course, necessary, for they are the gill-arclies. Thewhole of the blood passes through these arches, to beaerated in the gill-fringes. The use of this peculiarstructure is here obvious enough. If a lizard were eyera fish, and afterward turned into a lizard, changing itsgill-respiration for lung-respiration, then, of course, theuseless gill-arches would remain to tell the story. Now,although a lizard never was a fish, in its individual his-tory or ontogeny, it was a fish in its family history orphylogeny, and therefore it yet retains, by heredity, thiscurious and useless structure as evidence of its ancestry. That this is the true explanation is demonstrated bythe fact that in amphibians this very change actually 13G EVIDENCES OF THE TRUTH OF EVOLUTION. takes place before our eyes in the individual history. Wehave already seen that the individual frog, in its tadpolestate, is a gill-breat
Size: 1409px × 1774px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorlecontej, bookcentury1800, bookdecade1880, bookyear1888
