Animal biology media project
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Transcript of Animal biology media project
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Animal PregnancyAnimal Biology
by: Miko Atkins, Staci Davis, and Ofelia Patrick
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Topics of Discussion● Pregnancy in Deuterostomes● Pregnancy in Protostomes● Gestation Periods
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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
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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
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The Seahorse
https://www.youtube.com/watch?v=GMzMuLmjMW4
Male Pregnancy… Yes, Males
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Ummm i’m sure there must be some type of mistake...
We’re not related riiight???
Protostome Reunion
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● 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
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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
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HCG Placenta produces Stop ovaries from maturing egg ea month during pregnancy High level= increase nausea and vomiting
Hormones in pregnancy
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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
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Estrogen develop fetus organ and other bodily systems enhances uterus response to oxytocin responsible for skin changes
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Oxytocin stretches cervix for labor stimulates milk production Prolactin prepare breast tissue for lactation and milk release