How can asexual reproduction in planarias be described?

Platyhelminth identity card. How are platyhelminthes characterized according to examples of representing beings, basic morphology, type of symmetry, germ layers and coelom, digestive system, respiratory system, circulatory system, excretory system, nervous system and types of reproduction?

What are the main human diseases caused by platyhelminthes?

How are nutrients distributed by the digestive system in planarias?

What are the best known representatives of the platyhelminth phylum?

What is cephalization? How does lateral symmetry favor cephalization?

Into which classes are platyhelminthes divided? How are these classes characterized and what are some representative beings of each of them?

What is an example of freshwater flatworm? Due to that habitat what is the physiological problem that these animals must solve?

Is the nervous system in platyhelminthes more or less sophisticated than in cnidarians? What are the main neural structures found in flatworms? How is this neural organization important for the diversity of biological niches explored by species of the phylum?