Lect20reproduction

Lect20reproduction - Testis Prostate gland Bulbourethral...

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Figure 41.13 The Development of Human Sex Organs Figure 41.13 The Development of Human Sex Organs
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LE 45-8 Neurosecretory cells of the hypothalamus Endocrine cells of the anterior pituitary Portal vessels Pituitary hormones (blue dots) Pain receptors in the brain Endorphin Growth hormone Bones Liver MSH Melanocytes Prolactin Mammary glands ACTH Adrenal cortex TSH Thyroid Testes or ovaries FSH and LH TARGET HORMONE Hypothalamic releasing hormones (red dots) Tropic Effects Only FSH, follicle-stimulating hormone LH, luteinizing hormone TSH, thyroid-stimulating hormone ACTH, adrenocorticotropic hormone Nontropic Effects Only Prolactin MSH, melanocyte-stimulating hormone Endorphin Nontropic and Tropic Effects Growth hormone
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LE 46-14 Stimuli from other areas in the brain Anterior pituitary Hypothalamus Negative feedback Primary and secondary sex characteristics Leydig cells make testosterone LH Testis Sertoli cells Spermatogenesis GnRH FSH
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LE 46-10b Seminal vesicle Urethra Scrotum Glans penis
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Unformatted text preview: Testis Prostate gland Bulbourethral gland Erectile tissue of penis Epididymis (Urinary bladder) (Public bone) Prepuce Vas deferens Vas deferens Ejaculatory duct (Rectum) LE 46-10a Seminal vesicle (behind bladder) Urethra Scrotum Glans penis Testis Prostate gland Bulbourethral gland Erectile tissue of penis Vas deferens Epididymis (Urinary bladder) LE 46-12 Spermatogonium Primary spermatocyte (in prophase of meiosis I) Mitotic division, producing large numbers of spermatogonia Meiosis I completed Differentiation and onset of meiosis I Secondary spermatocyte Meiosis II Early spermatids Spermatids (at two stages of differentiation) Differentiation Sperm cells Neck Head Midpiece Tail Plasma membrane Mitochondria Acrosome Nucleus Sertoli cell nucleus Lumen of Seminiferous tubule Cross section of seminiferous tubule Testis Epididymis Seminiferous tubule...
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This note was uploaded on 10/05/2009 for the course BILD BILD 2 taught by Professor Schroeder during the Spring '08 term at UCSD.

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Lect20reproduction - Testis Prostate gland Bulbourethral...

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