PSYC 333 Chapter Notes - Chapter 6: Fetal Alcohol Spectrum Disorder, Postpartum Depression, Caesarean Section
12 Mar 2014
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Page 125-161, 36 pages page 1 of 17. Sperm meets egg: the incredible journey: on day 14 of the menstrual cycle, a woman ovulates. The ovum is picked up by fimbriae and enters the fallopian tube. If fertilized, it moves to the uterus using cilia; if not, it disintegrates: sperm is deposited in the vagina through ejaculation or assisted insemination. The sperm has already travelled through the seminiferous tubules, epididymis, vas deferens, ejaculatory duct, and urethra: the sperm has a head, midpiece, and tail, about 60 micrometres in length. The head contains dna in the nucleus, as well as rna that directs early embryonic development, and many proteins: the acrosome, a chemical reservoir, is located in the head. Sperm swim at 1-3cm per hour, although they may arrive at the egg within 1. 5hrs due to aid of uterine contractions: the egg is surrounded by a thin, gelatinous layer of zona pellucida.
