. Text-book of embryology. Embryology. £"â h Fig. 126.âDorsal view of pronephros of Polypterus at stages 20, 23, 24 +, 25 and about 28. , archinephric duct. The tubule rudiments are indicated by letters, the nephrotomes by Roman numerals. disappear, while B and E on the other hand increase in length and become the functional tubules. The anterior end of the archinephric duct becomes gradually modelled out of the solid rudiment already referred to in the way indicated in the :~~ Fig. 127.âPart of a longitudinal vertical section through the series of nephrocoeles in the
. Text-book of embryology. Embryology. £"â h Fig. 126.âDorsal view of pronephros of Polypterus at stages 20, 23, 24 +, 25 and about 28. , archinephric duct. The tubule rudiments are indicated by letters, the nephrotomes by Roman numerals. disappear, while B and E on the other hand increase in length and become the functional tubules. The anterior end of the archinephric duct becomes gradually modelled out of the solid rudiment already referred to in the way indicated in the :~~ Fig. 127.âPart of a longitudinal vertical section through the series of nephrocoeles in the pronephros of Polypterusâstage 24 +. , archinephric duct; ect, ectoderm ; end, endoderm ; , nephrocoele " B " ; , nephrocoele "; After it has assumed its definitive tubular form this front part of the archinephric duct commences to grow actively in length, it becomes thrown into complicated coils and forms a large fraction of the entire bulk of the pronephros in its early functional Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original MacBride, E. W. (Ernest William), 1866-1940; Kerr, John Graham, 1869-; Heape, Walter, 1855-1929. London : Macmillan
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Keywords: ., bookcentury1900, bookdecade1910, bookpubli, booksubjectembryology
