From anterior to posterior what is the sequence of specializ

From anterior to posterior, what is the sequence of specialized digestive system structures in an earthworm, according to the lab manual? List all of the defensive/offensive structures used against other organisms that will be encountered in specimens from today\'s lab: Which specimen from today\'s lab has testes, ovaries, seminal vesicles, and seminal receptacles? Which two of these would be used when the organism is performing its female role? What is the nutritional style or mode of each of the following? A. Sea anemone B. Green hydra C. Planarian D. Earthworm

Solution

3 Ans. Mouth opening is the first part which leads to pharynx consisting of pharyngeal muscles. Esophagus is the next part which lies underneath the heart. You will find a two structures close to the clitellum. First in the order is the crop, followed by the gizzard. The gizzard leads to the intestine which is as long as the worm and ends at the anu s.