Anatomy Physiology SIXTH EDITION Chapter 28 part 1

Anatomy & Physiology SIXTH EDITION Chapter 28, part 1 The Reproductive System Power. Point® Lecture Slide Presentation prepared by Dr. Kathleen A. Ireland, Biology Instructor, Seabury Hall, Maui, Hawaii Copyright © 2004 Pearson Education, Inc. , publishing as Benjamin Cummings Frederic H. Martini Fundamentals of

SECTION 28 -1 The Reproductive System Copyright © 2004 Pearson Education, Inc. , publishing as Benjamin Cummings

Learning Objectives • Specify the components of the reproductive system, and summarize their functions • Describe the components of the male and female reproductive systems • Outline the processes of meiosis and gametogenesis in both sexes • Explain the roles played by the male reproductive tract and accessory glands in the functional maturation, nourishment, storage, and transport of spermatozoa Copyright © 2004 Pearson Education, Inc. , publishing as Benjamin Cummings

Learning Objectives • Summarize the anatomical, physiological, and hormonal aspects of the male and female reproductive cycles • Discuss the physiology of sexual intercourse Copyright © 2004 Pearson Education, Inc. , publishing as Benjamin Cummings

Reproductive System • Reproductive system functions in gamete • Production • Storage • Nourishment • Transport • Fertilization • Fusion of male and female gametes to form a zygote Copyright © 2004 Pearson Education, Inc. , publishing as Benjamin Cummings

SECTION 28 -1 Introduction to the Reproductive System Copyright © 2004 Pearson Education, Inc. , publishing as Benjamin Cummings

Reproductive system includes: • Gonads (testes, ovaries) • Ducts • Accessory glands and organs • External genitalia Copyright © 2004 Pearson Education, Inc. , publishing as Benjamin Cummings

Males and Females • Males • Testes produce spermatozoa • Expelled from body in semen during ejaculation • Females • Ovaries produce oocytes • Immature ovum • Travels along uterine tube toward uterus • Vagina connects uterus with exterior of body Copyright © 2004 Pearson Education, Inc. , publishing as Benjamin Cummings

SECTION 28 -2 The Reproductive System of the Male Copyright © 2004 Pearson Education, Inc. , publishing as Benjamin Cummings

Male Reproductive System • Pathway of spermatozoa • Epididymis • Ductus deferens • Ejaculatory duct • Accessory organs • Seminal vesicles • Prostate gland • Bulbourethral glands • Scrotal sac encloses testes • Penis Copyright © 2004 Pearson Education, Inc. , publishing as Benjamin Cummings

Figure 28. 1 The Male Reproductive System Copyright © 2004 Pearson Education, Inc. , publishing as Benjamin Cummings Figure 28. 1

The testes • Descent of the testes • Movement of testes through inguinal canal into scrotum • Occurs during fetal development • Testes remain connected to internal structures • Spermatic cords Copyright © 2004 Pearson Education, Inc. , publishing as Benjamin Cummings

Figure 28. 2 The Descent of the Testes Copyright © 2004 Pearson Education, Inc. , publishing as Benjamin Cummings Figure 28. 2 a

Figure 28. 2 The Descent of the Testes Copyright © 2004 Pearson Education, Inc. , publishing as Benjamin Cummings Figure 28. 2 b

Figure 28. 3 The Male Reproductive System in Anterior View Copyright © 2004 Pearson Education, Inc. , publishing as Benjamin Cummings Figure 28. 3

Male Anatomy • Musculature of scrotal sac • Dartos muscle wrinkles scrotal sac • Cremaster muscle pulls sac close to body • Testes anatomy • Tunica albuginea surrounds testis • Septa extend from tunica albuginea to epididymus • Lobules Copyright © 2004 Pearson Education, Inc. , publishing as Benjamin Cummings

Sperm production • In seminiferous tubules • Interstitial cells between seminiferous tubules • Secrete sex hormones • Sperm pass through rete testis • Efferent ductules connect rete testis to epididymus Copyright © 2004 Pearson Education, Inc. , publishing as Benjamin Cummings

Figure 28. 4 The Structure of the Testes Copyright © 2004 Pearson Education, Inc. , publishing as Benjamin Cummings Figure 28. 4