. Fig-. 37.—Section of fowl's eg-g-; «, shell:/', tnenibrana putaminis; i\r^ laversof soft albumen; ./. clialaziv; <-, cicatricula and },'erniinal vesicle;/, air chamber. The oulliiie liirure shows the yolk made up of layers ue- posited successively, <', cicatricula, b, g-erniinal vesicle. small end towards the cloaca, the ^z% enters the uter- ine or shell-forming dilatation. The inner surface of this portion of the oviduct secretes and deposits upon the vievibrana putaminis a thick white fluid which condenses, becomes calcareous and forms the shell. The time required for the ^gg to pass
. Fig-. 37.—Section of fowl's eg-g-; «, shell:/', tnenibrana putaminis; i\r^ laversof soft albumen; ./. clialaziv; <-, cicatricula and },'erniinal vesicle;/, air chamber. The oulliiie liirure shows the yolk made up of layers ue- posited successively, <', cicatricula, b, g-erniinal vesicle. small end towards the cloaca, the ^z% enters the uter- ine or shell-forming dilatation. The inner surface of this portion of the oviduct secretes and deposits upon the vievibrana putaminis a thick white fluid which condenses, becomes calcareous and forms the shell. The time required for the ^gg to pass from the infundibulum to the uterus, in the common fowl, is said to be from four to six hours, and it may remain here from twelve to twenty liours. The color of the eg^g-shell depends upon j^igmental matter secreted by particular follicles of tl:e villous
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Photo credit: © The Bookworm Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, bookleafnumber152, bookyear1899
