Psychology 2075 Chapter Notes - Chapter 6: Amniocentesis, Gestational Diabetes, Semen Analysis
6 Mar 2018
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Woman ovulates around the 14th day of menstrual cycle, egg is released into the body cavity. Picked up by fimbriae (long finger-like structures) at the end of the fallopian tubes. Reaches uterus in about 5 days if it has been fertilized, otherwise disintegrates in about. Egg has no means of moving itself and is propelled by cilia. Cervix secretes mucus that flushes the passageways to prepare for the arrival of the sperm. Sperm is one of the tiniest cells in the human body is composed of a head, midpiece & tail. Acrosome a chemical reservoir, is also in the head of the sperm. Mitochondria is contained in the mid-piece, tiny structures in which chemical reactions occur that provide energy lashing (to move/propel forward) called flagellation. Sperm capable of swimming 1-3 centimeters per hour, by the time they have reached the egg, it has swum approx 3000 times its own length (approx. 4 km /2. 5 miles swimming for a human)
