Wednesday, January 5, 2011

1/5/10- Justin A.

Today we started off the day by going over UP page 4. For the rest of class we went through notes.

Human Reproduction
  • Both male and female have gonads. (organs that produce gametes). Males have testis and Females have ovaries.
Female Reproductive Anatomy
  • Ovaries- site of gamete production.
  • Follicles-Consists of single developing egg with tissue to nourish it.
  • Ovulation- When the egg is ejected from the follicle.
  • Corpus Luteum- The remaining follicle tissue after ovulation.
  • oviduct (fallopian tube)- Where fertilization takes place.
  • Uterus- site of pregnancy. Has muscle to expand to accommodate the fetus.
  • Endometrium- Layer of tissue that lines the uterus. Site where embryo implants itself.
  • embryo- from zygote to 9 weeks.
  • fetus- 9 weeks to birth.
  • cervix- neck at bottom of uterus
  • vagina-(birth canal) where sperm is deposited.
  • urethra- Tube for urine.
  • Labia Minora- skin around opening to vagina.
  • Labia majora- skin around genetil region.
  • Hymen- thin membrane partially covering vagina.
Male Reproductive Anatomy

  • Penis- Contains erectile tissue. Shaft that supports glans.
  • Testes- male gonads located outer body in scrotum.
  • scrtotum- sac that holds testes away from body.
  • epididymis- stores sperm
  • ejaculation- expulsion of sperm containg fluids from penis.
  • Pathway of sperm during Ejaculation.
  1. Leave epididymis.
  2. Vas deferen -duct
  3. seminal vesical and prostate gland.
  4. Empties into urethra
  5. semen- 95% fluid from glands and 5% sperm cells.

Gametogenesis- (production of gametes)
  • gametes are haploid ccells developed in meiosis.
Female Gametogenesis
  • oogenesis- developement of eggs with the ovaries.
  • At birth each follicle contians 1 dormant primary oocyte. (diploid cell)
  • FSH (Follicle Stimulating Hormone) trigger further developement of follicles.
  • Follicle enlarges and oocyte completes meiosis
  • Secondary oocyte recieves almost all of cytoplasm. Other degenerates.
  • IF sperm fuses with secondary oocyte, it will complete meiosis 2.
Male Gametogenesis
  • spermatogenesis- formation of sperm cells.
  • Some cells go under mitosis while the others go through meiosis.
  • four spermatids are produced after meiosis 2.
  • Spermatids are immature to sperm.
Homework:Pre lab 35-38,

Next scribe : Carey E.

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