Annelid Dissection

  The purpose of the annelid disection is to gain more anatomical knowledge about annelids, also to see how well we can indentify their internal organs and such. Dissections help us gain more information on the biological world because, we get to see many different organ structures of many different species and we also see how differently they eat, digest, excrete wastes and function differently from other species. This dissection greatly relates to what we are learning in class, before we saw the inside of the earthworm on paper, but with the dissection we get to see the internal organs in person. Personally I think its awesome that we did this dissection, we got to see stuff we probably would have never seen without this dissection.

1. What is the name of the pumping organs of an earthworm?
They are called the aortic arches, which are hearts, although
they do not contain valves and chambers.

 

2. Trace the parts of the digestive tract?
The food passes through the pharynx and
passes through the esophagus, then the crop
and the gizzard and finally through the
intestines.

 

3. Which parts of the earthworm serve as its brain
The brain is above the pharynx and connected
to the ventral nerves; it is firmly attached.

 

 

4. Which parts of the worm/excretory system?
The excretory system goes hand in hand with the
digestive system. However, a pair of nephridia
in each body segment helps remove waste

 

5. How can you find out whether an earthworm eats soil?
Put it in soil and examine its excrement in a glass jar

 

 

6. What are Setae?

They are like little black stubbles.
Setae are the small bristles that are good
for brushing against the soil, basically, providing
traction in the soil

 

Forgot other pictures and questions.