A&P II Male reproductive system
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| a 23 chromosome female gamete | ovum
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| a 23 chromosome male gamete | spermatozoon
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| 46 chromozomes capable of developing into a new individual | zygote
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| an ovoid structure that is about five centimeters long and three centimeters in diameter and is enclosed by a tough white fibrous capsule. | testis
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| subdivides the testis into about 250 lobules | septa
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| Each lobule contains a ___________ _________ that courses posteriorly and unites to form a complex network of channels. | seminiferous tubule
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| These channels give rise to ducts that join the | epididymis
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| The seminiferous tubules are lined with __________ cells that produce sperm. | spermatogenic cells
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| _________ cells are located within the spaces between the seminiferous tubules and produce and secrete male sex hormones. | Interstitial cells
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| A tad-pole shaped structure with a flattened head, cylindrical body, and an elongated tail. | Sperm cell
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| The head is composed of a nucleus containing highly compacted | chromatin.
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| The __________ contains enzymes that aid in penetrating the egg cell. | acrosome
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| The midpiece contains a central core and many ________ arranged in a spiral. | mitochondria
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| The tail of a sperm cell consists of several _________ enclosed in a cell membrane extension. | microtubules
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| During the embryonic stage ___________become active in response to hormones. | spermatogonia
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| Some spermatogonia undergo mitosis while others enlarge into primary | spermatocytes.
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| At puberty, ________ causes the primary spermatocytes to undergo meiosis and yield secondary spermatocytes. | testosterone
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| Each secondary spermatocyte divides into two | spermatids.
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| Spermatids mature into | sperm cells.
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