Question

3.1 are both male and female reproductive structures present in your specimen? 3.2 list several internal organs that are exemplary of segmentation in the earthworm. 3.3 put the following digestive structures in the order in which food passes through them in the earthworm: intestine, esophagus, gizzard, anus, pharynx, mouth, crop. procedure 1 next, examine a prepared slide of a cross - section (c.s.) through the body of an earth - worm using your compound microscope. 2 locate the following organs and structures depicted in figure 12.9: dorsal blood vessel, intestine, typhlosole, coelom, ventral nerve cord, epidermis, circular muscles, longitudi - nal muscles, nephridium, ventral blood vessel, and setae (setae may not be visible on every slide).

Explanation:

3.1 Earthworms are hermaphrodites, having both male and female reproductive structures.
3.2 Examples of segmented internal organs in earthworms include nephridia and parts of the digestive tract.
3.3 The order of food - passage through earthworm digestive structures is: mouth, pharynx, esophagus, crop, gizzard, intestine, anus.

Answer:

3.1 Yes
3.2 Nephridia, parts of digestive tract
3.3 Mouth, pharynx, esophagus, crop, gizzard, intestine, anus