EXPLAIN THE FOLLOWING- TROPHOBLAST, SPERMIATION, BIRTH CANAL, SPERMIOGENESIS. (ANY TH
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TROPHOBLAST - Trophoblasts (from Greek 'trephein': to feed; and 'blastos': germinator) are cells that form the outer layer of a blastocyst. They are present four days post-fertilization in humans. They provide nutrients to the embryo and develop into a large part of the placenta.
SPERMIATION - Spermiation is the process by which mature spermatids are released from Sertoli cells into the seminiferous tubule lumen prior to their passage to the epididymis.
BIRTH CANAL - the channel formed by the cervix, vagina, and vulva through which the fetus passes during birth.
SPERMIOGENESIS - Spermiogenesis is the final stage of spermatogenesis, which sees the maturation of spermatids into mature spermatozoa. The spermatid is a more or less circular cell containing a nucleus, Golgi apparatus, centriole and mitochondria. All these components take part in forming the spermatozoon.
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