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Cross section: pharynx region of an ascaris

Legend:

1  cuticula
2  muscle cells
3  pharynx
4  lateral chord
5  pseudocoel
6  nerve chord

English name: human ascoid
Scientific name: Ascaris lumbricoides
Familia: Ascaridae
Classis: Secernentea
Phylum: Nematoda
Regnum: Animalia