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Professor
Beau
BlakeThe flame-cell system in planarians consist of specialized cells called flame cells that are part of the excretory system. Flame cells have distinctive cilia that beat rapidly, creating a flickering appearance like a flame. These cells help regulate the osmotic balance and remove waste from the body by actively pumping fluids through the excretory system.
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Are planarians herbivores?
Yes
Is it true that adult planarians can focus well enough with their eyespots to form images of objects in their environment?
No, adult planarians are not able to form detailed images of objects in their environment with their eyespots. Eyespots are light-sensitive organs that can detect light and shadows, but they do not have the ability to create detailed images like a true visual system. Planarians rely more on their chemosensory capabilities for navigating their environment.
What does planarians eat?
Planarians are carnivorous creatures that feed on small invertebrates like worms, snails, and insect larvae. They use their muscular pharynx to suck in their prey and digest it externally. Planarians are opportunistic feeders and will also scavenge on decaying organic matter.
Why do planarians regenerate?
Planarians are able to regenerate because they have a population of adult stem cells called neoblasts that can differentiate into any type of cell needed. These neoblasts are responsible for the continuous growth and renewal of tissues in planarians, allowing them to regenerate lost body parts.
How does the method of internal transport of gases differ in earthworms and planarians?
Earthworms utilize their moist skin for gas exchange through diffusion, while planarians have a branching system of tubes called flame cells that help transport gases using cilia-driven fluid movements. This difference in internal transport of gases reflects the varying complexities in respiratory systems between the two organisms.
