tailieunhanh - Lecture Human anatomy and physiology - Chapter 27: The reproductive system (part a)

Chapter 27 - The reproductive system (part a), After completing this unit, you should be able to describe the structure and function of the testes, and explain the importance of their location in the scrotum; describe the phases of the male sexual response. | 27 The Reproductive System: Part A Reproductive System Primary sex organs (gonads): testes and ovaries Produce sex cells (gametes) Secrete steroid sex hormones Androgens (males) Estrogens and progesterone (females) Accessory reproductive organs: ducts, glands, and external genitalia Reproductive System Sex hormones play roles in Development and function of the reproductive organs Sexual behavior and drives Growth and development of many other organs and tissues Male Reproductive System Testes (within the scrotum) produce sperm Sperm are delivered to the exterior through a system of ducts Epididymis, ductus deferens, ejaculatory duct, and the urethra Male Reproductive System Accessory sex glands: seminal vesicles, prostate, and bulbourethral glands Empty secretions into the ducts during ejaculation Figure Peritoneum Seminal vesicle Ampulla of ductus deferens Ejaculatory duct Rectum Prostate Bulbourethral gland Anus Bulb of penis Epididymis Ureter Urinary bladder Prostatic urethra Pubis Membranous urethra Urogenital diaphragm Corpus cavernosum Corpus spongiosum Glans penis Prepuce External urethral orifice Spongy urethra Testis Scrotum Ductus (vas) deferens The Scrotum Sac of skin and superficial fascia Hangs outside the abdominopelvic cavity Contains paired testes 3 C lower than core body temperature (temperature necessary for sperm production) The Scrotum Temperature is kept constant by two sets of muscles Smooth muscle that wrinkles scrotal skin (dartos muscle) Bands of skeletal muscle that elevate the testes (cremaster muscles) Figure Penis Internal spermatic fascia Superficial inguinal ring (end of inguinal canal) Urinary bladder Spermatic cord Ductus (vas) deferens Autonomic nerve fibers Testicular artery Epididymis Pampiniform venous plexus Tunica vaginalis (from peritoneum) Tunica albuginea of testis Middle septum of scrotum Cremaster muscle External spermatic fascia Superficial fascia containing dartos muscle Skin Scrotum The Testes Each is . | 27 The Reproductive System: Part A Reproductive System Primary sex organs (gonads): testes and ovaries Produce sex cells (gametes) Secrete steroid sex hormones Androgens (males) Estrogens and progesterone (females) Accessory reproductive organs: ducts, glands, and external genitalia Reproductive System Sex hormones play roles in Development and function of the reproductive organs Sexual behavior and drives Growth and development of many other organs and tissues Male Reproductive System Testes (within the scrotum) produce sperm Sperm are delivered to the exterior through a system of ducts Epididymis, ductus deferens, ejaculatory duct, and the urethra Male Reproductive System Accessory sex glands: seminal vesicles, prostate, and bulbourethral glands Empty secretions into the ducts during ejaculation Figure Peritoneum Seminal vesicle Ampulla of ductus deferens Ejaculatory duct Rectum Prostate Bulbourethral gland Anus Bulb of penis Epididymis Ureter Urinary bladder Prostatic urethra

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