. Fig-. 34. Fig. 35. Figr. 36. Fig-. 34.—Egg from upper part of oviduct with coating of dense albumen called raembrana chalazifera continued into the chala'Zie. Fig. 35. —Out- stretched from opposite sides of the _volk showing opposite turns of the spiral. Fig. 3() —Egg from above middle of oviduct with tirst of soft albumen. upper portion of the oviduct and soon after the egg escapes from the ovary. Having entered the oviduct the ovum is propelled with a rotary motion bj' the peristaltic contractions of that tube, towards tlie cloaca. The contact of the ovum stimulates the li
. Fig-. 34. Fig. 35. Figr. 36. Fig-. 34.—Egg from upper part of oviduct with coating of dense albumen called raembrana chalazifera continued into the chala'Zie. Fig. 35. —Out- stretched from opposite sides of the _volk showing opposite turns of the spiral. Fig. 3() —Egg from above middle of oviduct with tirst of soft albumen. upper portion of the oviduct and soon after the egg escapes from the ovary. Having entered the oviduct the ovum is propelled with a rotary motion bj' the peristaltic contractions of that tube, towards tlie cloaca. The contact of the ovum stimulates the lin- ing membrane of the oviduct to secrete first a dense laj-er of albumen which is deposited upon the vitelline membrane and is continued thread-like from each pole. These threads or filaments are the chalazce and the dense layer of albumen with which they are connected is the mcvibraua chalazifera. As the egg rotates in the oviduct the chalazce become twisted in opposite directions, and the one next the small end of the egg finally adheres more or less to the membrane lining the shell at that jioint.
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Photo credit: © The Bookworm Collection / Alamy / Afripics
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Keywords: ., bookcentury1800, bookcollectionamer, bookdecade1890, bookyear1899
