8/18/13
Intro to the Kingdom Animalia
1. Multicellular
tissues
organs & organ systems
2. No cell walls
ECM with collagen
3. Chemoheterotrophic
ingestion & internal digestion
glycogen
4. diploid dominant LC [Fig 10-19a]
5. diverse body plans
6. most can move
sessile
7. unique tissues: muscle & nervous
8. reproduction
cleavage
gastrulation
metamorphosis
zygote -> embryo-----> blastula -> gastrula ------> larva ------------>
adult
cells
tissues/organs
1
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choanoflagellates
Animal origins
Monophyletic?
Pikaia
Paleozoic Era/
Cambrian
Period
(535-525 mya)
Cambrian
Explosion
2
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Neoproterozoic
Era
(565-550 mya)
Ediacaran biota
Hox genes?
Symmetry
Assymetry
Radial symmetry (and biradial symmetry)
Symmetry
Bilateral symmetry
superior vs. inferior
3
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Diploblastic
bodies
Triploblastic
bodies
51-9
Body
cavities of
triploblasts
Protostome vs. Deuterostome: cleavage patterns
4
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Protostome vs. Deuterostome:
embryonic blastopore forms _____
protostome
Mouth
deuterostome
Anus
Protostome vs. Deuterostome:
coelom formation
Schizocoelous
Enterocoelous
Skeletons
Terrestrial adaptations
Larval forms
5
8/18/13
Tree of
animals a work in
progress
6