Excretory

... you, since I am learning this concurrently, so I apologize in advance if necessary. Most excretion takes place by diffusion, although there is the excretory and osmoregulatory structure called the protonephridia. They are tubes with flame bulbs at the end which are collecting cells with cilia. ...

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... cavity separated from the abdominal cavity?" These were my guesses ... 1. The endocrine system and nervous system 2. Respiratory system 3. Excretory system 4. Because the thoracic and abdominal cavity have different organ system; It needs to operate independently of each other ... Or maybe ...

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It's really sad that we've turned one of our biggest ports, and the mouth of our largest river into the nation's excretory orifice. I was thinking about that just the other day, actually, as I was looking at the Mississippi River while visiting New Orleans. I was thinking about ...

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... my head against a brick wall. It's really sad that we've turned one of our biggest ports, and the mouth of our largest river into the nation's excretory orifice.

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Virtually all excretory systems have a "filter out the little stuff" and a "get back the good stuff" phase.

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