A gland that secretes externally through a duct. exocrine, exocrine gland. gland, secreter, secretor, secretory organ - any of various organs that synthesize substances needed by the body and release it through ducts or directly into the bloodstream.
Answer:
The respiratory system.
Explanation:
The circulatory system works with the respiratory system. The circulatory system transports oxygen through the body, while the respiratory system supplies the body with that oxygen.
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I believe the answer is echinodermataechinodermata and Chordata have a very similar embryonic development
During the transfer of energy from organic food to another form only about 10% of the energy is stored as flesh.