Answer:
The jellyfish is filled with tissue made of structural cells that are not metabolically active. Therefore, a mechanism to transport oxygen to its interior is not necessary.
Explanation:
The answer was D..............I DID IT AND GOT IT RIGHT
Vasodilation when you re hot(arterioles dilates so more blood flows through the surface of the skin,vasoconstriction vhen you re cold(arterioles constrict so less blood flows through the surface of the skin)
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The skin and nervous tissues develop from the ectoderm.
nitrogen, carbon, hydrogen, oxygen, phosphorous, and sulfur