Your SlideShare is downloading. ×
0
Chapter 46 - Animal Reproduction
Chapter 46 - Animal Reproduction
Chapter 46 - Animal Reproduction
Chapter 46 - Animal Reproduction
Chapter 46 - Animal Reproduction
Chapter 46 - Animal Reproduction
Chapter 46 - Animal Reproduction
Chapter 46 - Animal Reproduction
Chapter 46 - Animal Reproduction
Chapter 46 - Animal Reproduction
Chapter 46 - Animal Reproduction
Chapter 46 - Animal Reproduction
Chapter 46 - Animal Reproduction
Chapter 46 - Animal Reproduction
Chapter 46 - Animal Reproduction
Chapter 46 - Animal Reproduction
Chapter 46 - Animal Reproduction
Chapter 46 - Animal Reproduction
Chapter 46 - Animal Reproduction
Chapter 46 - Animal Reproduction
Chapter 46 - Animal Reproduction
Chapter 46 - Animal Reproduction
Upcoming SlideShare
Loading in...5
×

Thanks for flagging this SlideShare!

Oops! An error has occurred.

×
Saving this for later? Get the SlideShare app to save on your phone or tablet. Read anywhere, anytime – even offline.
Text the download link to your phone
Standard text messaging rates apply

Chapter 46 - Animal Reproduction

1,702

Published on

Published in: Education, Technology
0 Comments
2 Likes
Statistics
Notes
  • Be the first to comment

No Downloads
Views
Total Views
1,702
On Slideshare
0
From Embeds
0
Number of Embeds
2
Actions
Shares
0
Downloads
21
Comments
0
Likes
2
Embeds 0
No embeds

Report content
Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
No notes for slide

Transcript

  • 1. Animal Reproduction & DevelopmentAP Biology 2007-2008
  • 2. What is the advantage of this development Oogenesis system?  Unequal meiotic divisions  unequal distribution of cytoplasm  1 egg  2 polar bodies Meiosis 1 completed during egg maturation ovulation Meiosis 2 completed triggered by fertilization Put all your eggAP Biology in one basket!
  • 3. Fertilization  fertilization  cleavage  gastrulation  neurulation  organogenesisAP Biology
  • 4. Fertilization  Joining of sperm & egg  sperm head (nucleus) enters eggAP Biology
  • 5. Cleavage  Repeated mitotic divisions of zygote  1st step to becoming multicellular  unequal divisions establishes body plan  different cells receive different portions of egg cytoplasm & therefore different regulatory signalsAP Biology
  • 6. Cleavage  zygote  morula  blastula  establishes future developmentzygote gastrulationmorulaAP Biology blastula
  • 7. gastrulation in Gastrulation primitive chordates Establish 3 cell layers  ectoderm  outer body tissues  skin, nails, teeth  nerves, eyes, lining of mouth ectoderm  mesoderm  middle tissues  blood & lymph, bone & notochord, muscle mesoderm  excretory & reproductive systems  endoderm  inner lining endoderm  digestive system  lining of respiratory, excretory & reproductive systems AP Biologyprotostome vs. deuterostome
  • 8. Testing… All of the following correctly describe the fate of the embryonic layers of a vertebrate EXCEPT A. neural tube and epidermis develop from ectoderm B. linings of digestive organs and lungs develop from endoderm C. notochord and kidneys develop from endoderm D. skeletal muscles and heart develop from mesoderm E. reproductive organs and blood vessels develop from mesodermAP Biology
  • 9. Testing… In a study of the development of frogs, groups of cells in the germ layers of several embryos in the early gastrula stage were stained with five different dyes that do not harm living tissue. After organogenesis (organ formation), the location of the dyes was noted, as shown in the table below. Tissue Stain Brain Red Notochord Yellow Liver Green Lens of the eye Blue Lining of the digestive tract PurpleAP Biology
  • 10. Neurulation  Formation of notochord & neural tube  develop into nervous system develops into CNS Neural tube (brain & spinal cord) Notochord develops into vertebral columnAP Biology
  • 11. Organogenesis Umbilical blood vessels Mammalian embryo ChorionBird embryo Amnion Yolk sac Allantois Fetal blood vessels Placenta Maternal blood vesselsAP Biology
  • 12. Placenta  Materials exchange across membranesAP Biology
  • 13. Human fetal development 4 weeks 7 weeksAP Biology
  • 14. Human fetal development 10 weeksAP Biology
  • 15. Human fetal development12 Biology AP weeks 20 weeks
  • 16. Human fetal development  The fetus just spends much of the 2nd & 3rd trimesters just growing …and doing various flip-turns & kicks inside amniotic fluid Week 20AP Biology
  • 17. Human fetal development  24 weeks (6 months; 2nd trimester) fetus is covered with fine, downy hair called lanugo. Its skin is protected by a waxy material called vernixAP Biology
  • 18. Human fetal development  30 weeks (7.5 months) umbilical cordAP Biology
  • 19. Getting crowded in there!!  32 weeks (8 months) The fetus sleeps 90-95% of the day & sometimes experiences REM sleep, an indication of dreamingAP Biology
  • 20. positive feedback BirthAP Biology
  • 21. Birth (36 weeks)Intestine PlacentaUmbilicalcord Wall of uterus Bladder CervixAP Vagina Biology
  • 22. The end of the journey! And you think 9 months of AP Bio is hard!AP Biology

×