. Comparative embryology of the vertebrates; with 2057 drawings and photos. grouped as 380 illus. Vertebrates -- Embryology; Comparative embryology. VITELLINE MEMBRANE CORTICAL GRANULE PLASMA SURFACE _,_____^^VITE LLI NE \ -X^" MEMBRANE ^^^-'"^==^0 0 R T I C A L _^^^^ GRANULES " P L A S M A 2 S U R FACE. FE RT IL IZ AT ION MEMBRANE PLASMA SURFACE Fig 129 Formation of the fertilization membrane in the mature egg of the sea urchin. (A) Surface of the egg and surrounding jelly coat before fertilization. (After Runnstrom, '49 p 245 ) (Bl 2 3 4, 5) Point x marks the point of sperm co
. Comparative embryology of the vertebrates; with 2057 drawings and photos. grouped as 380 illus. Vertebrates -- Embryology; Comparative embryology. VITELLINE MEMBRANE CORTICAL GRANULE PLASMA SURFACE _,_____^^VITE LLI NE \ -X^" MEMBRANE ^^^-'"^==^0 0 R T I C A L _^^^^ GRANULES " P L A S M A 2 S U R FACE. FE RT IL IZ AT ION MEMBRANE PLASMA SURFACE Fig 129 Formation of the fertilization membrane in the mature egg of the sea urchin. (A) Surface of the egg and surrounding jelly coat before fertilization. (After Runnstrom, '49 p 245 ) (Bl 2 3 4, 5) Point x marks the point of sperm contact. The fertilization membrane separates'from the egg at the point of sperm contact and spreads rapidly around the egg from this point. (After Just, '39, p. 106.) (C) Membrane forma ion m greater detail (After Runnstrom, '49, p. 276.) (1) As the vitelline membrane is ed off from the plasma surface of the egg, cortical granular material is exuded from the egg cortex and passes out across the perivitelline space toward the fertilization mem- brane (2) Cortical granules begin to consolidate with the vitelline membrane. (3) Fully developed fertilization membrane is formed by a union of the vitelline membrane with the cortical granules derived from the egg cortex. 258. 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 Nelsen, Olin E. (Olin Everett), b. 1898. New York, Blakiston
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Keywords: ., bookcentury1900, bookcollectionameri, bookcollectionbiodiversity
