Introduction to Kingdom Animalia
Characteristics of Animals
Heterotrophic
Multicellular
Movement Eukaryotic
Basic Embryology
Define: Zygote Embryo Blastula Gastrula
Embryonic Germ Layers
– outside layer Mesoderm – middle layer Endoderm – inside layer
Ectoderm
LAYER Ectoderm
Mesoderm
Endoderm
ORGAN & ORGAN SYSTEM Nervous system Skin Muscles Circulatory System Skeletal System Reproductive System Lining of gut and respiratory tracts Liver Pancreas
Animals With No Embryonic Stages
Sponges
Cnidarians
Ctenophorans
Protostomes – blastopore becomes mouth
Acoelomates – no body cavity
– Platyhelminthes
Draw the acoelomate body plan in your notes here. Pseudocoelomates – fake body cavity
– Nematodes
Draw the pseudocoelomate body plan in your notes here.
Deuterostomes – blastopore becomes anus
All are Eucoelomates – true body cavity
– Mollusks – Annelids – Arthropods – Echinoderms – Chordates
Draw the eucoelomate body plan in your notes here.
Symmetry
Assymmetry
–Irregular shapes –Do not move –Sponges
Symmetry
Radial
Symmetry
–Can divide into equal halves using many planes –Cnidaria (stinging animals) –Echinoderms (sea stars)
Symmetry
Can
only divide into left & right halves Most efficient for movement
– Flatworms – Roundworms – Mollusks – Segmented Worms – Chordates
Anatomical Positions
DORSAL
POSTERIOR
ANTERIOR
VENTRAL