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Evolutionary origins of metazoans

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  • August 20, 2023
  • 64
  • 2022/2023
  • Class notes
  • Natalina salmaso
  • All classes
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zarrahosainy
Today’s lecture




• Course outline + meet your TA
• Introduction to my work and to the course
• Historical perspective of developmental
biology
• Evolution of the nervous system
• Introduction to Basic embryogenesis
(continued next class): Blastula,
Gastrulation, Neurulation




Who am I?

● Developmen ● Astrocyte ● Clinica
t s l
● EDI in
STEM




Follow us on Twitter:
@Salmasolab
@NeuroCarleton

, Who am I?

● Developmen ● Astrocyte ● Clinica
t s l
● EDI in
STEM




Follow us on Twitter:
@Salmasolab
@NeuroCarleton

Animals


• Protozoan- a single celled
microscopic animal
Reproduction by splitting in two
• But evolution favoured cells
clumping together- increased
survival…enter…
• Metazoan- a multicellular
animal

, Animals


• Protozoan- a single celled
microscopic animal
Reproduction by splitting in two
• But evolution favoured cells
clumping together- increased
survival…enter…
• Metazoan- a multicellular
animal


Figure 1.1 Evolutionary origins of metazoans

, Figure 1.1 Evolutionary origins of metazoans


-




I
meltizellester organ




Figure 1.2 Nerve nets make up the first nervous systems

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