Animal biology media project

15 pages

Please download to get full document.

View again

of 15
All materials on our website are shared by users. If you have any questions about copyright issues, please report us to resolve them. We are always happy to assist you.
1. Animal Pregnancy Animal Biology by: Miko Atkins, Staci Davis, and Ofelia Patrick 2. Topics of Discussion ● Pregnancy in Deuterostomes ● Pregnancy in Protostomes…
  • 1. Animal Pregnancy Animal Biology by: Miko Atkins, Staci Davis, and Ofelia Patrick
  • 2. Topics of Discussion ● Pregnancy in Deuterostomes ● Pregnancy in Protostomes ● Gestation Periods
  • 3. Deuterostomes ● Morphologically complex ● Share similar development ● Variable morphology & behavior ● Develop anus first, as opposed to protostomes 4 Phyla of Deuterostomes: - Echinodermata: sea stars & sea urchins - Hemichordata: acorn worms - Chordata: vertebrates - Xenoturbellida: worm-like organisms *more recently discovered
  • 4. Deuterostome Gestation Period Sea Horse 14 days - 4 weeks Starfish No gestation period, but the time it takes for a fertilized starfish egg to develop into a baby starfish is around 2 months depending on the species Human 36-40 weeks Chimpanze 32-33 weeks Humpback Whales 12-15 months Elephants 20-21 months Deuterostome Gestation
  • 5. The Seahorse Male Pregnancy… Yes, Males
  • 6. Ummm i’m sure there must be some type of mistake... We’re not related riiight??? Protostome Reunion
  • 7. ● Protostomes have true tissues, they are bilaterally symmetric, and the mouth develops first during embryonic development ● Protostomes also have an anterior brain, central nervous system, and a coelum. Protostomes
  • 8. Development of C. elegans ● There are precisely 959 cells during development ● Development of C. elegans from larvae to adulthood takes 2.5 days at 25 degrees celsius. ● During periods of starvation C. elegans develops into Dauer larvae, once food is available the dauer larvae reaches the L4 stage and the life cycle takes about 3 days. C. elegens
  • 9. C. elegans Embryonic Development
  • 10. Snail Embryonic Development
  • 11. HCG Placenta produces Stop ovaries from maturing egg ea month during pregnancy High level= increase nausea and vomiting Hormones in pregnancy
  • 12. Progesterone corpus luteum produces until 10 weeks then placenta takes over production relaxes uterus muscle, help keep immune system healthy relaxes smooth muscle and blood pressure increase hair growth
  • 13. Estrogen develop fetus organ and other bodily systems enhances uterus response to oxytocin responsible for skin changes
  • 14. Oxytocin stretches cervix for labor stimulates milk production Prolactin prepare breast tissue for lactation and milk release
  • Related Search
    We Need Your Support
    Thank you for visiting our website and your interest in our free products and services. We are nonprofit website to share and download documents. To the running of this website, we need your help to support us.

    Thanks to everyone for your continued support.

    No, Thanks

    We need your sign to support Project to invent "SMART AND CONTROLLABLE REFLECTIVE BALLOONS" to cover the Sun and Save Our Earth.

    More details...

    Sign Now!

    We are very appreciated for your Prompt Action!