WebJun 4, 2009 · See answer (1) Best Answer. Copy. The hydra has a single opening digestive tract so what goes in has to come out the same way. Worms have two openings to their digestive tract so things can just ... The digestive system of the worm contains an alimentary canal and ducts together with the physiology of digestion. Alimentary canal of the earthworm The alimentary canal spans from the mouth to the anus as it is lengthy. It consists of the following parts: 1. Mouth:1st segment 2. Buccal Cavity:2nd-3rd section or … See more Charles Darwin, a British biologist, began and completed his nearly 45-year work with investigations, tests, and hypotheses about earthworms. Earthworms are particularly … See more Earthworms live upon various forms of detritus and natural decomposition like decomposing leaves, microorganisms, etc. found in soil. They may eat freely on grasslands and other … See more In the early 1800s, Mackinac Island in Michigan didn't sound like the most plausible location for anyone to discover how digestion functioned, yet that's precisely where … See more
Earthworms - University of Pennsylvania
WebMay 31, 2010 · All major nervous, circulatory, and digestive organs are located near the head. The posterior segments, which are nearly identical to each other, contain … WebDigestive System. The digestive system starts at the mouth. You will trace the organs all the way to the anus and identify each on the worm. Find the mouth opening, the first … green tick copy and paste emoji
How does the digestive system of a hydra compare with that of an earthworm?
WebUnlike their predecessors, roundworms have a tube digestive system, meaning food flows in one direction (in one end and out the other). This is in contrast to the digestive … WebMar 3, 2011 · No. A closed digestive system is a digestive system in which there is only one opening which serves both for food intake and waste excretion and can be found in creatures like the sea anemone or ... fnd tel