What is the characteristic of mollusk?
Molluscs (also know as mollusks) are soft-bodied, bilaterally symmetrical, segmented, coelomate animals; usually shelled having a mantle, ventral foot, anterior head, and a dorsal visceral mass.
What are the parts of a mollusk?
The four important body parts in the mollusk could be listed as: Shell, Mantle, Visceral Mass and Foot.
What does segmentation allow for?
Segmentation provides the means for an organism to travel and protect its sensitive organs from damage. The ability to divide functions into different portions of the body allows an organism to perform increasingly complex activities and use different segments to perform varying functions.
What is the body structure of mollusks?
Summary. The body plan of a mollusk usually consists of a head region, a muscular foot, and a visceral mass of internal organs that is often contained within a dorsal shell. Each class possesses some variation on this basic plan. The organization of the gastropod body is very similar to the basic body plan of mollusks.
What kind of segmentation does a Mollusca have?
No Mollusc has any segmentation. Q: What segmentation does mollusca have? Write your answer… Does a mollusca have a segmentation? Does the phylum mollusca have segmentation? No, molluscs do not have segmentation, although there are three body regions which are not considered segmentations; a head, visceral mass and the (muscular) foot.
What kind of mollusks are in the annelid group?
The annelids traditionally include the oligochaetes, which include the earthworms and leeches, the polychaetes, which are a marine group, and two other smaller classes.
What makes up the visceral mass of a mollusk?
The head contains the sense organs and “brain,” while the visceral mass contains the internal organs. The “foot” is the muscular lower part of the body which is in contact with the substrate. Mollusks usually have a shell (although some do not).
Are there any body regions that do not have segmentation?
No, molluscs do not have segmentation, although there are three body regions which are not considered segmentations; a head, visceral mass and the (muscular) foot. What is the most active mollusca? Are mollusca deuterostome or protostome?