Presentation on theme: "Unit 10 Chapter 38 Reproduction and Development. Human Male Anatomy Testes Male gonads: produce male gametes & male hormones Suspended outside body in."— Presentation transcript:
Unit 10 Chapter 38 Reproduction and Development
Human Male Anatomy Testes Male gonads: produce male gametes & male hormones Suspended outside body in sac called scrotum, for maintaining proper temperature
Human Male Anatomy Epididymis Coiled tube within the scrotum in which the sperm complete their maturation Vas deferens A duct that transports sperm from the epididymis toward the urethra Vas deferens Epididymis
Human Male Anatomy Glands adding nutrient secretions to semen: Seminal vesicles (one pair at base of urethra) Prostate (one lying below urethra) Bulbourethral glands (one pair located beneath the prostate) Seminal vesicles Prostate Bulbourethral gland
Human Female Anatomy Ovary Female gonads; producing female gametes & hormones Suspended below oviduct Oviduct (Fallopian tubes) Transports eggs from ovary to uterus; site of fertilization
Human Female Anatomy Uterus (womb) Hollow, muscular organ where implantation, development & labor occur The lower end of the uterus, called the cervix, opens into the birth canal, the vagina
The Menstrual Cycle Follicle Stage In the ovary, the follicle containing the ovum (egg), develops In the uterus, the endometrium (lining) begins to thicken In the glandular tissue, estrogen peaks follicle egg
The Menstrual Cycle Ovulation In the ovary, the follicle ruptures, releasing the ovum into the oviduct In the uterus, the endometrium continues to thicken In the pituitary gland, LH peaks
The Menstrual Cycle Luteal Stage In the ovary, the ruptured follicle becomes the corpus luteum In the uterus, the endometrium builds to its maximum In the glandular tissue, progesterone peaks Corpus luteum
The Menstrual Cycle Menstrual stage In the ovary, the new follicle begins to develop In the uterus, the menstrual flow begins In the glands, hormones level off
Menstrual cycle Click on image to play video.
Development Fertilization Union of the egg and sperm; the zygote begins dividing as it moves through oviduct Implantation After repeated divisions, the blastocyst attaches to the endometrium
Development The embryo (surrounded by the amniotic sac) produces the placenta (formed from the chorion) attached to the embryo by the umbilical cord (formed by the allantois & yolk sac) Placenta provides food & oxygen and removes wastes during fetus’ development
Embryonic development Click on image to play video.
Development Labor (physiological & physical changes a female goes through to give birth) 1) dilation of the cervix 2) expulsion of the baby 3) afterbirth (expelling the placenta & umbilical cord)