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Stages of Oogenesis (1st stage - before birth)

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Stages of Oogenesis (1st stage - before birth)

Starts with Oogonia (before birth) Primary follicles contain a primary oocyte Matures and then Graafian Follicle contains the secondary oocyte Ovulation occurs and the follicle turns into the Corpus Luteum (secretes hormones for pregnancy)

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Structure and functions of the Fallopian tubes (including fimbriae)

Receives ovulated oocyte Fimbriae - finger-like projections at distal ends - receives oocyte Site for fertilization Not attached to the ovary Cilia and peristalsis in the fallopian tube slowly move the oocyte toward the uterus (3-4) days

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Structure and functions of the uterus including 3 uterine wall layers

Endometrium, Myometrium, Perimetrium

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Endometrium

Inner layer. Thickens to allow implantation of a fertilized egg. (If sheds, no implantation)

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Myometrium

Muscle Contracts to give birth (involuntary and smooth) Causes cramps when on period

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Perimetrium

Outer layer. Smooth, slick, and reduces friction with other organs

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Structure and function of the vagina

Structure - posterior to the bladder, anterior to the rectum Function - birth canal, receives the penis during sexual intercourse Hemen - partially closes vagina until it is ruptured

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External Genitalia (including openings)

1.) Urethral opening 2.) Vaginal opening 3 & 4 Paraurethral Gland parallel to the prostate 5 & 6 Greater vestibular glands correspond to the bulbourethral gland 7.) Anal Opening

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Anterior pituitary hormones (brain)

Follicle Stimulating Hormone (FSH) Luteinizing Hormone (LH) talks to ovaries

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Follicle Stimulating Hormone (FSH)

matures the primary follicle and primary oocyte into the Graafian follicle and secondary oocyte

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Luteinizing Hormone (LH)

ruptures the Graafian follicle (ovulation) and then turns in the corpus lutetium

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Ovarian cycle (Estrogen & Progesterone)

Estrogen - tells the uterus to get thick Progesterone - stay think in order to maintain pregnancy

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Uterine Cycle

Receives, Retains, and Nourishes the egg

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What happens if there's not enough progesterone?

The wall does not stay thick and the pregnancy is lost

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