Sexual Reproduction 2 Mechanisms of Sexual Reproduction 1

Sexual Reproduction 2 Mechanisms of Sexual Reproduction 1) External Fertilization: Female and male release gametes into the environment (where fertilization takes place) pp. 535

Animal Reproduction and Development 2 Mechanisms of Sexual Reproduction 2) Internal Fertilization: Male deposits sperm inside the female reproductive tract. Fertilization takes places inside the female pp. 535

Animal Reproduction and Development Overview of Male Reproductive System Testes = Male Gonad: Produces sperm (gamete) Epididymis: Stores sperm until ejaculation Vas deferens: Carries sperm to the urethra (it mixes with seminal fluid prior to ejaculation) pp. 538 -539 Fig. 27. 4 A

Animal Reproduction and Development Overview of Male Reproductive System Fig. 27. 4 B pp. 538

Animal Reproduction and Development Seminal Vesicles: Secretes a thick fluid containing mucus and much fructose to nourish sperm on their travels Fig. 27. 4 B pp. 538

Animal Reproduction and Development Prostate Gland: Secretes an thin fluid that further nourishes sperm (additional monosaccharides) Fig. 27. 4 B pp. 538

Animal Reproduction and Development Bulbourethral Glands: Secretes alkaline fluid just prior to ejaculation – lubricates urethra and neutralizes urine Fig. 27. 4 B pp. 538

Animal Reproduction and Development Overview of Female Reproductive System Fig. 27. 3 A pp. 536

Animal Reproduction and Development Ovary = Female gonad: Produces the ovum (egg: gamete) Fig. 27. 3 A pp. 536

Animal Reproduction and Development Oviduct: Receives the egg from the ovary and is where fertilization typically occurs Fig. 27. 3 A pp. 536

Animal Reproduction and Development Uterus: receives embryo and is where implantation occurs + formation of the placenta Fig. 27. 3 A pp. 536

Animal Reproduction and Development Ectopic Pregnancies occur when embryo implants outside the inner uterine wall Fetus in oviduct non-text http: //a 248. e. akamai. net/7/248/430/20080327144036/ www. mercksource. com/ppdocs/us/common/dorlands/dorland/images/pregnancy_ectopic%20 p. (1). jpg

Animal Reproduction and Development Details of the Female Ovary 1) Production of the ovum or ‘egg’ 2) Egg develops in a follicle (cells that surround + nurture egg) pp. 541 Similar to Fig. 27. 5 B

Animal Reproduction and Development Details of the Female Ovary 3) Ovarian follicle - Contains and nurtures eggs - Pituitary gland secretes Follicle Stimulating Hormone (FSH) and Luteinizing hormone (LH) to initiate growth pp. 543 Similar to Fig. 27. 5 B

Animal Reproduction and Development Details of the Female Ovary 4) Egg ruptures from follicle - Term for this rupture is Ovulation - LH stimulates the rupture pp. 543 Similar to Fig. 27. 5 B

Animal Reproduction and Development Details of the Female Ovary 5) Remaining follicle becomes Corpus luteum - Secretes Progesterone - Prepares endometrium to receive embryo pp. 538 Similar to Fig. 27. 5 B

Animal Reproduction and Development Details of the Female Ovary 6) If egg is not fertilized, Corpus luteum degenerates pp. 538 Similar to Fig. 27. 5 B