easy to exchange gases
Platyhelminthes =)
free-flatworms belong to: phylum - Platyhelminthes. class - Turbellaria.
Platyhelminthes breathe using their entire body. Being flat, oxygen diffuses quickly across the skin and to all parts of the body, so they don't need a blood circulatory or respiratory system.
Platyhelminthes.
Worms. Platy is greek for flat and helminthes is Greek for worm.
Tapeworms are classified in the phylum Platyhelminthes, which is a group of flatworms.
Marine flatworms belong to the phylum Platyhelminthes, which includes various flatworm species found in marine environments. These flatworms are known for their flat, ribbon-like bodies and can be found in a wide range of marine habitats worldwide.
It means flatworms "platy" means flat "helminthes" means worms
There is a special reason that flatworms are flat. Because of their flatness the area of their 'body' is bigger (so a bigger surface area). Through this characteristic, they are able to diffuse more in and out of their endosystem.
The flatworm's scientific name (or at least its Phylum) is Platyhelminthes. I can't give you the real scientific name (which is the genus and species) because there are more than one species of flatworm.
No, ragworms are polychaetes under phylum Annelida (rounded worms). Platyhelminthes are the flat worm phylum.
The selective advantage of a mature red blood cell being flat rather than a sphere is that is it easier for the cells to fit through veins and arteries. Red blood cells are also known as erythrocytes.