In most of the Aschelminthes, the respiratory and circulatory systems are absent. Where do they get their oxygen needed for living from?

They can absorb oxygen directly from air.

They have special oxygen cylinder attached to them.

They have an air bubble feeds them.

They obtain oxygen from their host through their body wall.

In most of the Aschelminthes, the respiratory and circulatory systems

1.	In most of the Aschelminthes, the respiratory and circulatory systems are absent. Where do they get their oxygen needed for living from?
A.	They can absorb oxygen directly from air.
B.	They have special oxygen cylinder attached to them.
C.	They have an air bubble feeds them.
D.	They obtain oxygen from their host through their body wall.
Answer» E.

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In most of the Aschelminthes, the respiratory and circulatory systems are absent. Where do they get their oxygen needed for living from?

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