Travel of sperm

Travel of sperm

In almost all embryophytes , including most gymnosperms and all angiosperms , the male gametophytes pollen grains are the primary mode of dispersal , for example via wind or insect pollination , eliminating the need for water to bridge the gap between male and female. Sperm counts vary from about 20 million to million sperm cells per milliliter of ejaculate. The ejaculation process begins as the penis fills with blood and becomes erect. Now we know that sperm contain not little people but DNA. They are produced in flask-shaped structures containing nectar , which attract flies that transfer the spermatia to nearby hyphae for fertilization in a mechanism similar to insect pollination in flowering plants. Also, there are more of the intricate labyrinths of tubes and nurse cells that are critical for the production of sperm.

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Travel of sperm

Travel of sperm

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Travel of sperm

Travel of sperm

Travel of sperm

Travel of sperm

Travel of sperm

Travel of sperm

Travel of sperm

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