Throat.
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 part after the mouth is the pharynx, you will see stringy things attached to either side of the pharynx (pharyngeal muscles). A gizzard is a sack like organ at the back of the earthworms throat. The gizzard basically chews the earthworm's food since the worm doesn't have any teeth. The crop is a thin … ner organ closer to the head. The crop stores food. 11. The digestive system starts at the mouth. You will trace the organs all the way to the anus and identify each on the worm. a. Find the mouth opening, the first part after the mouth is the pharynx, you will see stringy things attached to either side of the pharynx (pharyngeal muscles). The crop of a worm is a digestive organ that stores food before it goes through the gizzard (a digestive organ that helps break down food) so it doesnt break down the fo … od at all. Just stores it. 15 people found this useful. You will find 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 anus. Solid wastes exit the earthworm at the anus; however, liquid wastes leave each segment through the nephridia. 5. Use your scissors to cut open the crop and the gizzard. In which organ would you expect the contents to be more ground up.
http://www.lodi.k12.wi.us/faculty/tenbaca/Earthworm%20Anatomy%20and%20Dissection.doc http://www.answers.com/Q/When_dissecting_a_worm_specifically_the_crop_and_gizzard_which_organ_would_the_contents_be_more_ground_up http://www.shellyssciencespot.com/Worksheets/Animals/Invertebrates/EarthwormDissectionLab.pdf http://www.answers.com/Q/When_dissecting_a_worm_specifically_the_crop_and_gizzard_which_organ_would_the_contents_be_more_ground_up http://www.lodi.k12.wi.us/faculty/tenbaca/Earthworm%20Anatomy%20and%20Dissection.doc
in which organ-- gizzard or crop-- would you expect to find the contents more ground up