WebFlatworm definition, any worm of the phylum Platyhelminthes, having bilateral symmetry and a soft, solid, usually flattened body, including the planarians, tapeworms, and … WebFlatworms range in length from about 1 millimeter (0.04 inches) to more than 20 meters (66 feet). They have a flat body because they do not have a coelom or even a pseudocoelom. They also lack a respiratory system. Instead, their cells exchange gases by diffusion directly with the environment. They have an incomplete digestive system.

Flatworm - Reproductive structures and features Britannica

WebJul 18, 2024 · Bipalium kewense is another predatory flatworm related to the one in the Facebook video from Malaysia. This invasive species can be found across the southern United States, from the East to West ... WebThe ancient flatworms were the first animals to develop a central nervous system and a head with a brain. The head had eyes—the first in the animal world. The flatworm body … lincoln s herndon

Bizarre Hammerhead Worm with a

WebReproduction. With very few exceptions, platyhelminthes are hermaphroditic, and their reproductive systems are generally complex. Numerous testes but only one or two ovaries are usually present in these flatworms. The female system is unusual in that it is separated into two structures: the ovaries and the vitellaria, often known as the ... WebPlanarians are free-living flatworms. Like other flatworms the planarian has a bilateral body plan with a brain and stereo eyes that enable it to actively hunt. Unlike the flashy … WebFeb 17, 2024 · Flatworms That Live on Land. Hammerhead flatworms are predatory land animals with a narrow, elongated body and an unusual head shaped like a half moon or a pickaxe. They are native to Asia. Giant hammerhead flatworms are impressive animals that can reach a length of one to three feet. The animals have been introduced to the United … lincoln shield penny value