1) The name of the Earthworm's pumping organs are the 5 aortic arches, or hearts. (to put it in simpler terms)
The arrow points towards the one of the hearts. |
2) The digestive tract begins at the mouth, which is the opening. The food would then get sucked in by the Pharynx and then moves through the Esophagus and into the Crop. The Crop then moistens the food and is then grinded up by the Gizzard. The food then moves to the Large Intestine for more digestion, and then wastes are excreted through the anus.
The whole worm in its entirety cut open. |
3) The Cerebral Ganglion is the part that serves as the Earthworm's brain. The rest of the body is connected through a ventral nerve cord, and at each segment, it is connected to a ganglion which is a cluster of nerves that connects the segments to the brain.
A close up image of a worm brain taken through the microscope lens. |
4) The anus and the nephridia are 2 parts of the excretory system that I saw.
Lower half of the worm. |
5) By taking a look at the inside of worm, you can see soil in its digestive system.
The digestive system is visible in this picture. |
6) Setae, in latin means "bristle." They help Earthworms attach to surfaces and prevent them from backsliding while they move.
A fun cartoon showing what setae is, since I wasn't able to get a picture. |
7) From the large amounts of soil, the Gizzard grinds down all the food from the Crop (where food is stored) and ingests the distinguished food from the soil.
The upper part of the of the worm shows the digestive system. |
8) Beyond segment 32 would be the rest of the digestive system and the worm's digested food.
An up close shot of the lower part of the worm. |
9) Since earthworms are hermaphroditic, the mating worms exchange sperm with one another. The sperm would then be stored in until matured. After maturing, the worms clitellium will make a sticky liquid that forms a ring, which now has the fertilized eggs.
An overall picture of the dissected earthworm. |
Purpose-3/4
ReplyDeleteConnection to class-2/4
Personal Reflection-4/4
Conventions-4/4
Requirements-9/9
22/25