Answer:
<em>At the respiratory membrane, where the alveolar and capillary walls meet, gases move across the membranes, with oxygen entering the bloodstream and carbon dioxide exiting. It is through this mechanism that blood is oxygenated and carbon dioxide, the waste product of cellular respiration, is removed from the body.</em>
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3 methods of irrigation are drip, surface, and sprinkler. Sprinkler irrigation applies water to soil, surface irrigation transports it to the channels where it floods the field, and drip irrigation exposes the roots to more supplies of water.
