muscle, Nerve, excretory, and reproductive organs
yes
Yes. Somewhat simpler than us, but not primitive.
heres 2: Reproductive Organs Coelom (these are 2 of the answers to question #3 Mr. Mikinney's homework assignment today 11/2/10)
No, flatworms and roundworms are not single-celled eukaryotes; they are multicellular organisms that belong to the animal kingdom. Flatworms are part of the phylum Platyhelminthes, while roundworms belong to the phylum Nematoda. Both are classified as invertebrates and exhibit complex body structures, with specialized tissues and organs.
Roundworms breathe through their thin, permeable skin which allows gases to pass in and out of their bodies by diffusion. They do not have specialized respiratory organs like lungs or gills. Oxygen dissolved in water is absorbed through their skin, while waste gases like carbon dioxide are released out.
They have a coelom, a space between the skin of the roundworm that allows the organs to move around freely by themselves.
Roundworms
Roundworms belong to the phylum Nematoda.
Toxocara canis and cati, Ascaris lumbricoides, Baylisascarisprocyonis
Roundworms can harm dogs ect;
No, roundworms have bilateral symmetry.
Roundworms rule the domain of the Phylum'Nematoda'.