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Which phyla developed an external shell to protect its internal organs?
Wiki User
∙ 13y ago
Mollusca
answer 2 Well, we do not know that the Molluscal developed the shell to protect its internal organs, we only know that by developing an external shell, that did protect its internal organs.
But the shell gave it more than that. The animal now had a frame onto which it could anchor its organs, and thus use superior locomotion or feeding. And in our human case, a skeleton that enables and protects all sorts of things.
The shell was not an essential for protection; for ordinary garden snails, and squids and octopuses [[one puss, 2 puses in English] have all let their shell degenerate to a minor internal feature.
Wiki User
∙ 13y ago
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What is External structure of animals?
The external structures of animals protect the animal from harm to internal organs. An example of an external structure is the skin and fur on a bear. The skin protects the internal organs, and the fur protects the skin.
Why is there pools of blood surrounding the internal organs?
To protect you'r internal organs
Does a moose have external or internal reproduction?
a moose is a mammal and most mammals have internal organs
What is the function of the urogenital system?
involving the external and internal reproductive organs and the urinary system. The term genitourinary denotes the sharing of common orifice for discharge in the two systems
Why must external fertilization in animals always occur in water?
Not all species that are aquatic use external fertalization. Dolphins se internal fertilization but it is very dificult because they would have to evolve adapted sexual organs and i dont think fishes have the right organs for internal fertalizations so they juust eject it into water. I'm not sure this is correct but i hope it helps. You might nneed to check it before you use it in any peices of writing.
What is the functions of internal and external organs?
There are many different internal organs with many different functions but they basically keep the body functioning properly. The external organs' main job is to protect the body.
What is External structure of animals?
The external structures of animals protect the animal from harm to internal organs. An example of an external structure is the skin and fur on a bear. The skin protects the internal organs, and the fur protects the skin.
How does a skeleton protect internal organs?
Well the rib cage surrounds and protects the heart, lungs, liver, spleen, kidneys and other internal organs from damage from external trauma. So the bones act as a shield for the organs.
Why is there pools of blood surrounding the internal organs?
To protect you'r internal organs
What do human bones protect?
Your bones protect your internal organs from injury.
What are External female sex organs?
All of the organs of a female are internal. I'm not quite sure what you mean about external?
Does a moose have external or internal reproduction?
a moose is a mammal and most mammals have internal organs
Does all bones protect all internal organs?
no
What is skin used for?
To protect our internal organs from germs.
Which difference between external n internal part of your body?
The external is the outside of your body, like the skin. The internal is the inside where all of your organs and your heart are.
What to human ribs protect?
Internal organs such as the lungs and heart.
What internal organs do the skull protect?
The skull protects the brain.
