Features of platyhelminthes?????
Answers
Answer:
they are flat worms and also unsegmented.
General characteristics of phylum Platyhelminthes
(Platys: flat; helminthes: worms)
Kingdom: Animalia
Habitat: mostly parasitic, few are free living in sea water or fresh water
Grade of organization: Organ- system grade of organization
Symmetry: Bilateral symmetry and Body is dorso-ventrally flattened
Germ layer: Triploblastic. Ectoderm is very specialized with distinct epidermis
Coelom: Absent (acoelomate).
Digestive system: incomplete or absent
No mouth (oral opening directly into pharynx).
No true stomach structure (pharynx opens into a complex “intestinal” structure).
In tapeworms, Direct absorption of soluble nutrients by cells and tissues.
Excretory system: Protonephridia with Flame cell
Respiration: by simple diffusion of gases through body surface
Circulatory system: Absent
Reproduction
Sexual: by gamatic fusion in hermaphrodite species
Asexual : by regeneration and fission
Fertilization: internal.
Life cycle is complex involving one or more hosts.