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29 Cards in this Set

  • Front
  • Back
Kingdom Animelia
1. Multicellular and Eukaryotic
2. hetertrophy is by ingestion (eat other organisms or eat decomposing organic matteral)
3. Nervous and muscle tissue unqie to animals
4. typically sexual reproduction, motile sperm, non motile eggs, diploid, stage dominant
free living sexually immature stage
Animal king all monophyletic common ancester
Colonial choanoflagellate
Radial Symmetrical
Can cut any way
Phylum Cnidaria - diploblastic -- endo, ecto
Phylum Ctenophora –

Top – Oral
Bottom – Aboral
Bilateral Symmetry
Top – Dorsal Head- Anterior
Bottom – Ventral Tail – Posterior
Concentntration of sensory structures
If bilaterial animal cephalization ...
cephalization accurs at anterior end (head) because thats the way they move
2 degree radially symmetry, start off bilaterial and devolp into radial. No true tissue
moderatly cephallized, bilaterail, cerebal ganglion (brain), Ocellus (eye part),
space between outer body wall and digestive track, cushin organs thus preventing injury, allow internail orgins to move and grow independent of the outter body wall.
soft bodied animal
Hydrostatic skeleton acts as support and rigidity
without coelom
(Phylum Plathelminthes)
flatworms/planaria, body filled with spongy mesoderm (parerchyma)
(Phylum Plathelminthes)
body cavity complety lined with mesoderm
not completly lined mesoderm, roundworms phylum (Nermatoda)
has deuterostomia and protostomes
Split into two clades: Clade Lophotrochozoa and Ecdysozoa
Protostomes devolpement
1. Mouth from blastopore
2. Spiral and determinate
3. Schizocoelous
Deuterostome devolpement
1. Anus from blastospore
2. Radial and indeterminate
3. Enterocoelous
Protostomes devolpement
Spiral - cleavage where the blastomers do not form layers. Determinate - the fate of each embroynic cell is established early. Schizocoelous - solid masses of mesoderm split and form coelom
Deuterostomes devolopment
Radial - blastomeres form layers, alligned. Indeterminate - the fate is not determined embroynic cell contains compacity to devolp into a complter embry if isolated. Enterocoelous - folds of archenteron form coelom.
Only two left in Deuterostomia
Echinodermata, Chordata
Clade Lophotrochozoa and Ecdysozoa.
refers to a characteristic shared by nematodes, arthropods. These animals secrete external skeletons; the stiff covering of a cricket is an example. As the animal grows, it molts, squirming out of its old exoskeleton and secreting a new, larger one. The shedding of the old exoskeleton is called ecdysis, the process for which the ecdysozoans are named
refers to two different structures observed in animals belonging to this clade. Some animals, such as ectoprocts, develop a structure called a lophophore, a crown of ciliated tentacles that function in feeding. Other phyla, including annelids and molluscs, go through a distinctive larval stage called the trochophore larva—hence the name lophotrochozoan.
Trichophore larvae
Annelids and Molluscs
Lophophorates with lophophore (ciliated tentacles)
feeding structures

1. Ectoprocta
2. Phoronida
3. Brachiopoda
1. Ectoprocta
2. Phoronida
3. Brachiopoda
trochophore larva
four phyla that undergo this larval stage: Annelida, Mollusca, Nemertea, and Platyhelminthes