compare and contrast the morphology of Cestodes Trematodes a

compare and contrast the morphology of Cestodes, Trematodes, and Nematodes.

Feature

Nematodes (roundworms)

Cestodes (tapeworms)

trematodes (flukes)

Shape

thread-like, cylindrical bodies; elongate, tapered at both ends

Elongated, flat, ribbon like body

Dorsoventrally flattened, oval; analogous to tree leaf

Segmented

Yes with segments called proglottids

Symmetry

bilaterally symmetrical

length

from microscopic to nearly 1 m long

Few mm to serval meters

Few cm to 9 cm

Head end

Suckers & hooks absent. Well-developed buccal cavity

Suckers generally with hooks

Suckers with no hooks

Alimentary Canal

Present; Complete with both mouth and an_s

Absent

Incomplete; no an_s

Body Cavity

Present (pseudocoeloms)

Absent

Sexes

Mostly dioecious

hermaphroditic

Hermaphroditic except Schisto

Feature	Nematodes (roundworms)	Cestodes (tapeworms)	trematodes (flukes)
Shape	thread-like, cylindrical bodies; elongate, tapered at both ends	Elongated, flat, ribbon like body	Dorsoventrally flattened, oval; analogous to tree leaf
Segmented	No	Yes with segments called proglottids	No
Symmetry	bilaterally symmetrical	bilaterally symmetrical	bilaterally symmetrical
length	from microscopic to nearly 1 m long	Few mm to serval meters	Few cm to 9 cm
Head end	Suckers & hooks absent. Well-developed buccal cavity	Suckers generally with hooks	Suckers with no hooks
Alimentary Canal	Present; Complete with both mouth and an_s	Absent	Incomplete; no an_s
Body Cavity	Present (pseudocoeloms)	Absent	Absent
Sexes	Mostly dioecious	hermaphroditic	Hermaphroditic except Schisto