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triploblastic with
embryonic mesoderm
bilaterally
symmetrical
coelom?
pseudocoelomate
free living and
parasitic
C elegans
used extensively as model system for research
cylindrical body
complete digestive system with mouth and anus
epidermis
single layer of cells or fusion of many single cells
syncytium
fusion of many single cells on epidermis
cuticle
rich in collagen and chitin (strength)
mouth
3-6 lips and teeth
muscles
attached to dorsal and central nerve cords → strong muscular contraction during movement
head ganglia
where nerves come together (ceph)