Zoology Lecture 15

Molluscanshells can be modeled by which of the following basic solid geometry objects? –Hemisphere –Cone –Pyramid –Cube –Cylinder
- Cone cause it grows ever outwards bot in no other way like a cone would grow
- /^\
- / \ etc.
Odontophore apparatus what is ment by this

the base of the radula
Why did the molluscan mdigut even evolve

the molluscan midguy evolved to process fine particles produced by the odontophore aparatus
Give the structure names of the molluscan midgut
- Crop
- Stomach
- Hepatopancrease
- intestine
give a generalized idea of where food goes starting from the foregut

forgut to the revovleing "style" which grinds the food down where it will either then go out to the intesitnes or ir will go to the hepatapancrease and then out to the intestines
When they say polyplachophora you say

chitons
When they say gastropoda you say

snails and slugs
when they say bivalvia you say

clams mussles oysters and shipworms
when they say cepholopoda you say

squids octapus and cuttlefish
Torsin in gastropods just saying
When does torsion occur in gastropods

torsion occurs during gastropod develoment
How many stages are there to torsion

two
What are some advantages to torsion of the body
- quicker retreat
- better balance
How is breathing accomplished in molluscs

ctenidia (the cmb thing at the posterior on non torsioned molluscs)

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Will123

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Zoology Lecture 15

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Zoology Lecture 15

Updated

2010-10-24T22:23:43Z

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