reproductive system 1

• Functions of the reproductive system

  • Produce gametes
  • Hormone production
  • For fertilization, structures to deliver sperm cells (♂)
  • Receive sperm cells (♀)
  • For females only: nurture development of fetus
  • Lactation for nourishment of baby
• Gonads


  The primary sex organs that produce gametes
• Gonads and Gametes


  • Male: Testes, Spermatozoa (sperm)
  • Female: Ovaries, Ova (eggs)
• Hormones of the Reproductive System


  1. Hypothalamus secretes GnRH

  2. Anterior Pituitary secretes FSH and LH

  3. Gonads secrete Estrogen, Progesterone, Inhibin, Testosterone
• GnRH


  Gonadotropin releasing hormone
• FSH


  Follicle stimulating hormone
• LH


  Luteinizing hormone
• Gametogenesis refers to the formation of gametes
• Spermatogenesis


  Gametogenesis in males (sperm)
• Oogenesis


  Gametogenesis in females (ova)
• Gametogenesis results in haploid cells that may fuse to form a single diploid cell (zygote)
• Chromosomes: 22 pairs of autosomes, 1 pair of sex chromosomes
• Haploid sperm carries either an X or a Y chromosome, haploid ovum carries an X chromosome
• Primary sex organs


  The gonads
• Secondary sex organs


  Facilitate movement of gametes formed by the primary sex organs to the fertilization site
• Secondary sex characteristics


  Develop at the time of puberty and promote attraction