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Egg Cell

Egg Cell. Maria Paula Coz, Daniela Mazzetti & Gabriela Echeandía 9ºA. Location. All of the immature egg cells a woman will ever produce are stored in the ovaries by the time she is born .

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Egg Cell

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  1. EggCell Maria Paula Coz, Daniela Mazzetti & Gabriela Echeandía 9ºA

  2. Location • All of the immature egg cells a woman will ever produce arestored in the ovariesby the time she is born. • During each menstrualcycle, hormonalmessages from the brain cause the ovaries to develop a single mature egg cell for fertilization.

  3. Ovaries • They are a pair of female reproductive organs, located in the pelvis (one on each side of the uterus). • The ovaries are connected to each other by the Fallopian tubes.  • They are the main source of female hormones (estrogen and progesterone)and they also regulate the menstrual cycle and pregnancy.

  4. Ovulation • Ovulation occurs each month when theovaries are stimulated by the hormones FSH (Follicle Stimulating Hormone) and LH (Leutinizeing Hormone). • Once the egg matures it is ovulated, and it travels through the fallopian tubes to the uterus. • During Ovulation and immediately after, the uterus lining thickens in preparation for a fertilized egg. 

  5. Fertilization • Fertilization occurs in oviducts (fallopian tubes) of the female reproductive tract. • Only one of the approximately 300 million sperm that released into a female's vagina can fertilize the single female egg cell. • The successful sperm cell must enter the uterus and swim up the fallopian tube to meet the egg cell, where it passes through the thick coating surrounding the egg. • This coating, consisting of sugars and proteins, is known as the “ZonaPellucida”. • The ovum is fertilized inside the female body, and the embryo then develops inside the uterus, receiving nutrition directly from the mother.

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