12 Reproductive

12 Reproductive - Reproduction I. Asexual Reproduction II....

Info iconThis preview shows pages 1–17. Sign up to view the full content.

View Full Document Right Arrow Icon
Reproduction I. Asexual Reproduction II. Unusual Sexual Reproduction in Some Animals III. Human Reproduction A. Spermatogenesis B. Oogenesis C. Hormonal Control of Gametogenesis D. The Female Reproductive Cycle E. Pregnancy
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Mechanisms of Asexual Reproduction Many invertebrates reproduce asexually by fission Figure 46.2 Sea anemone undergoes fission
Background image of page 2
Mechanisms of Asexual Reproduction Figure 42.1 Asexual Reproduction in Animals Fromia sp. Hydra sp. budding regeneration
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Mechanisms of Asexual Reproduction
Background image of page 4
Among vertebrates, several genera of fishes, amphibians, and lizards, including whiptail lizards reproduce exclusively by parthenogenesis . Fig. 46.4 Ovary size Hormone level Behavior Estradiol Ovulation Ovulation Progesterone Time Female Male- like Female Male- like
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Fig. 46.3 Asexual reproduction Female Sexual reproduction Female Generation 1 Male Generation 2 Generation 3 Generation 4 Benefits of Sexual Reproduction??
Background image of page 6
Fig. 46.1 Unusual Sexual Reproduction: hermaphroditic earthworms Some hermaphrodites are simultaneously male and female
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Unusual Sexual Reproduction Other hermaphrodites are first functionally one sex, then the other Wrasses (reef fish)
Background image of page 8
Fertilization Mechanisms- External Fertilization Figure 46.5 Eggs
Background image of page 9

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Fertilization Mechanisms -Internal Fertilization
Background image of page 10
Human Reproduction
Background image of page 11

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Reproductive Anatomy of the Human Male Fig. 46.11b Seminal vesicle (Rectum) Vas deferens Ejaculatory duct Prostate gland Bulbourethral gland Vas deferens Epididymis Testis Scrotum (Urinary bladder) (Urinary duct) (Pubic bone) Erectile tissue Urethra Glans Prepuce Penis
Background image of page 12
Fig. 46.12c Primordial germ cell in embryo Mitotic divisions Spermatogonial stem cell Mitotic divisions Spermatogonium Mitotic divisions Primary spermatocyte Meiosis I Secondary spermatocyte Meiosis II Early spermatid Differentiation (Sertoli cells provide nutrients) Sperm 2 n 2 n 2 n n n n n n n n n n n Sperm are Generated by Meiosis
Background image of page 13

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Fig. 46.12b Epididymis Seminiferous tubule Sertoli cell nucleus Testis Cross section of seminiferous tubule Spermatogonium Primary spermatocyte Secondary spermatocyte Spermatids (two stages) Sperm Lumen of seminiferous tubule Spermatogenesis Takes Place Within Seminiferous Tubules in the Testis Leydig cells between seminiferous tubules produce testosterone Sertoli cells transfer nutrients to spermatocytes and spermatids Leydig cells
Background image of page 14
Spermatogenesis
Background image of page 15

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Epididymis Seminiferous tubule Testis Cross section of seminiferous tubule Sertoli cell nucleus Primordial germ cell in embryo Mitotic divisions Spermatogonial stem cell Mitotic divisions Mitotic divisions Spermatogonium
Background image of page 16
Image of page 17
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 38

12 Reproductive - Reproduction I. Asexual Reproduction II....

This preview shows document pages 1 - 17. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online