Question

features of platyhelminthes​

Answer 1

Their body is dorsoventrally flattened.

They exhibit bilateral symmetry.

Also, they are triploblastic, with three germ layers.

They do not have a body cavity and are acoelomate.

Body is soft and unsegmented.

They are mostly parasitic with a few free-living.

Answer 2

Answer:

Characteristic features of Phylum Platyhelminthes

--Their body is dorsoventrally flattened.

--They exhibit bilateral symmetry.

--Also, they are triploblastic, with three germ layers.

--They do not have a body cavity and are acoelomate.

--Body is soft and unsegmented.

--They are mostly parasitic with a few free-living

--They exhibit an organ system grade of organization.

--The digestive system is incomplete or absent. There is a single opening which leads to a well-developed gastro-vascular cavity. The anus is absent.

--There is no true stomach structure. In a few species, the digestive system      is completely absent.

--Respiratory and circulatory systems are absent. Respiration generally occurs through diffusion through the general body surface.

--The excretory system has protonephridia with the flame

--There is primitive nervous system present.

--These animals are hermaphrodites.

--Sexual reproduction happens through gametic fusion.

--Asexual reproduction also happens in a few species through regeneration and fission.

--Fertilization is internal.

--The life cycle of these organisms can be complex, especially if they are parasitic, as this may involve one or more host animals.

Explanation: