How are flatworms more advanced than cnidarians?
Flatworms are more complex than cnidarians. Cnidarians have two layers of cells, the ectoderm and the endoderm; flatworms have a middle layer called the mesoderm between the other two layers (Fig. 3.16). The cells of the ectoderm and endoderm are also more organized than similar cells of cnidarians.
What is the benefit of how flatworms bodies are shaped?
Flat Shape The shape of a flatworm allows the species to survive without a circulation system. The purpose of circulation is to deliver oxygen and remove waste from cells throughout the body — specifically the cells furthest from the surface.
What is the body covering of flatworms?
Most flatworm species live in fresh and marine waters, although some live on land. Their soft, flattened bodies are composed of three layers—the ectoderm, endoderm, and mesoderm. They may be covered by a protective cuticle or by microscopic hairs, called cilia.
How are flatworms classified and what are their characteristics?
Flatworms are unsegmented worms with a tail and a head end. They are bilaterally symmetrical with a definite upper and lower surface. They have no body cavity or and no specialized respiratory or circulatory organs. Most species are hermaphrodites, having both female and male reproduction organs.
What kind of body plan does a flatworm have?
The flatworm’s bilateral body plan has a head with a brain and stereo eyes that enable it to actively hunt. Its mouth and pharynx are in the center of its underside. With no circulatory system, the gut distributes food to all parts of the body. About Flatworms.
Are there any flatworms that can regrow a body?
Stanford University biologists sliced this planarian, a type of flatworm, into four pieces to study each fragment’s ability to become a healthy, whole planarian. Humans do have a few types of tissue that can regenerate, says Dr. Stephen Badylak, deputy director of the McGowan Institute for Regenerative Medicine at the University of Pittsburgh.
How are Platyhelminthes different from other flatworms?
PLATYHELMINTHES DIGESTIVE SYSTEM. This Phylum, as mentioned before, has a different and unique kind of digestive system compared to other flatworms. This is because it only has one opening for it’s digestive system which is also used for it’s mouth but not anus making their digestive tract incomplete.
How are tapeworms similar to Hydras and corals?
tapeworms. Like cnidarians (= hydras, jellyfish, and corals), flatworms have a rather simple body plan and share some features with them. They also have a few morphological advancements over cnidarians. Some characteristics of flatworms are: 1) They are triploblastic, as all three primary germ layers (e.g., ectoderm, endoderm and