WebThe 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. Topic. Animation. Tags. stereo senses. pharynx. cilia. planarian. central nervous system. WebThe phylum Platyhelminthes contains the simplest forms of the bilaterally symmetrical metazoa (the group which includes humans). There are about 20,000 species of flatworm. ... Here is a diagram of a planarian worm. Castrella. This microturbellarian flatworm of the genus Castrella is gliding amongst strands of filamentous algae. This individual ...
Class Turbellaria - Characteristics, Habitat, …
WebThe graph shows the relationship between gill surface area and body mass for three species of fish. (b) (i) (ii) Describe the relationships between gill surface area, mass and swimming speed shown in the diagram. all 3 go up Explain the relationship between gill surface area and swimming speed. more oxygen can be supplied; for more respiration; WebThe body of a flatworm is adapted for efficient gas exchange between the water and the cells inside the body. Using the diagram, explain how two features of the flatworm's body allow efficient gas exchange. (2) (Thin / flat body) so short distance for diffusion / short diffusion pathway; ... dev keeps a record in graph form
Worms: Flatworms: Turbellarians: Introduction with …
WebPhylum Platyhelminthes belongs to kingdom Animalia. This phylum includes 13,000 species. The organisms are also known as flatworms. These are acoelomates and they include many free-living and parasitic life forms. Members of this phylum range in size from a single-celled organism to around 2-3 feet long. Characteristics of Platyhelminthes WebFlatworm definition, any worm of the phylum Platyhelminthes, having bilateral symmetry and a soft, solid, usually flattened body, including the planarians, tapeworms, and … WebA flame cell is a specialized excretory cell found in the simplest freshwater invertebrates, including flatworms, rotifers and nemerteans; these are the simplest animals to have a … devk appel tornow