reproductive system
TRANSCRIPT
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Pathway of spermatozoa Epididymis Ductus deferens (Vas deferens) Ejaculatory duct
Accessory organs Seminal vesicles Prostate gland Bulbourethral glands Scrotal sac encloses testes Penis
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Seminiferous tubules Contain spermatogonia
Stem cells involved in spermatogenesis Contain sustentacular cells
Sustain and promote development of sperm
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Testes produce mature spermatozoa Sperm enter epididymus
Elongated tubule with head, body and tail regions
Monitors and adjusts fluid in seminiferous tubules
Stores and protects spermatozoa Facilitates functional maturation of
spermatozoa
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Seminal vesicles Active secretory gland Contributes ~60% total volume of semen Secretions contain fructose, prostaglandins,
fibrinogen
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Prostate gland Secretes slightly acidic prostate fluid
Bulbourethral glands Secrete alkaline mucus with lubricating
properties
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Typical ejaculate = 2-5 ml fluid Contains between 20 – 100 million
spermatozoa per ml Seminal fluid
A distinct ionic and nutritive glandular secretion
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Ovum production Occurs monthly in ovarian follicles Part of ovarian cycle
Follicular phase (preovulatory) Luteal phase (postovulatory)
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Muscular organ Mechanical protection Nutritional support Waste removal for the developing embryo and
fetus Supported by the broad ligament and 3
pairs of suspensory ligaments
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Myometrium – outer muscular layer Endometrium – a thin, inner, glandular
mucosa Perimetrium – an incomplete serosa
continuous with the peritoneum
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Repeating series of changes in the endometrium
Continues from menarche to menopause Menses
Degeneration of the endometrium Menstruation
Proliferative phase Restoration of the endometrium
Secretory phase Endometrial glands enlarge and accelerate their
rates of secretion
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Vulva Vestibule Labia minora and majora Paraurethral glands Clitoris Lesser and greater vestibular glands
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Control the reproductive cycle Coordinate the ovarian and uterine cycles
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Key hormones include: FSH
Stimulates follicular development LH
Maintains structure and secretory function of corpus luteum
Estrogens Have multiple functions
Progesterones Stimulate endometrial growth and secretion
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Modified from Pearson Education