. Animal biology. Zoology; Biology. ORIGIN OF THE SEX CELLS 111 the cytoplasm. The nucleus becomes the larger part of the body, or head, of the mature sperm cell, which in many higher animals resem- bles in shape a tadpole with a very long tail. From a portion of the ^^^^^Xm Primordial germ celt Multiplicoition period. and so on for a larye f^^J^^^er of cell d/i^/s/ons ^FyT^ any one oocjonium Growth period ^-'Synapsis Primary oocyte Moif urcation period Secondary oocyte Matured egg cell C/ \ Me/otic division 1 (i^ First polar body. Please note that these images are extracted from scanned page
. Animal biology. Zoology; Biology. ORIGIN OF THE SEX CELLS 111 the cytoplasm. The nucleus becomes the larger part of the body, or head, of the mature sperm cell, which in many higher animals resem- bles in shape a tadpole with a very long tail. From a portion of the ^^^^^Xm Primordial germ celt Multiplicoition period. and so on for a larye f^^J^^^er of cell d/i^/s/ons ^FyT^ any one oocjonium Growth period ^-'Synapsis Primary oocyte Moif urcation period Secondary oocyte Matured egg cell C/ \ Me/otic division 1 (i^ First polar body. 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 Wolcott, Robert Henry, 1868-1934; University of Nebraska (Lincoln campus). Dept. of Zoology. New York ; London : McGraw-Hill Book Company, Inc.
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