describe the phylum – mollusca ?
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# MOLLUSCA :-
→ It is the second largest phylum of animal kingdom. They are soft bodied and shell animals. Ex :- snails, Cuttlefish etc. The body have variety of shapes and are usually segmented but Neopilina is segmented mollusca.
# CHARACTERISTICS :-
1. They have organ system level of organisation.
2. They are bilaterally symmetry and triploblastic.
* Bilateral symmetry :- In which body can cut into two equal halves by a single plane.
* Triploblastic :- in which three layers namely endoderm, mesoderm and ectoderm are present.
3. Digestive tract is complete.
4. They respire through gills.
5. Circulatory system is mostly of open type.
6. Excretory system includes one or two pairs of sac like kidneys.
7. Foot are present which act as appendages.
8. The body is usually differentiated into three regions namely :-
a) anterior head with sense organs.
b) ventral foot for movement.
c) dorsal visceral mass.
_______________________________________________
HOPE IT HELPS YOU.
___________________________
# MOLLUSCA :-
→ It is the second largest phylum of animal kingdom. They are soft bodied and shell animals. Ex :- snails, Cuttlefish etc. The body have variety of shapes and are usually segmented but Neopilina is segmented mollusca.
# CHARACTERISTICS :-
1. They have organ system level of organisation.
2. They are bilaterally symmetry and triploblastic.
* Bilateral symmetry :- In which body can cut into two equal halves by a single plane.
* Triploblastic :- in which three layers namely endoderm, mesoderm and ectoderm are present.
3. Digestive tract is complete.
4. They respire through gills.
5. Circulatory system is mostly of open type.
6. Excretory system includes one or two pairs of sac like kidneys.
7. Foot are present which act as appendages.
8. The body is usually differentiated into three regions namely :-
a) anterior head with sense organs.
b) ventral foot for movement.
c) dorsal visceral mass.
_______________________________________________
HOPE IT HELPS YOU.
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2
PHYLUM MOLLUSCA
Damascus include a number of family animals including snails vestas plants Octopus eats and treats many species have shell molluscs are generally simple although some have secondarily lost the signatory in part they have well developed exit Re digestive respiratory and circulatory systems. in old molluscs accept the circulatory system is open or molecules our body regions had food which is the sensory and locomotive part of the body of isomers containing most of the organ curves and mental which covers the mass and secrets person if one is present most molluscs also have regular arresting structure covered with teeth which is used in feeding.
Hope it will help you
Damascus include a number of family animals including snails vestas plants Octopus eats and treats many species have shell molluscs are generally simple although some have secondarily lost the signatory in part they have well developed exit Re digestive respiratory and circulatory systems. in old molluscs accept the circulatory system is open or molecules our body regions had food which is the sensory and locomotive part of the body of isomers containing most of the organ curves and mental which covers the mass and secrets person if one is present most molluscs also have regular arresting structure covered with teeth which is used in feeding.
Hope it will help you
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