Answer:
Renewable resource: Sunlight, water, wind,
Norenewable: coal, natural gas, oil
Explanation:
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Answer:
These are needed to mimic the blood vessels which these organs will use for the supply or drainage of fluids e.g blood.
In addition the empty tunnels serve as the routes for nutrients and oxygen supply for the organ.
In summary the tunnels provided a vascular structure to support the organ
Explanation:
Cells lining the small intestine are specialized for absorption of nutrients. their plasma membrane <span>has </span><span>microvillus </span>(plural:<span> m</span>icrovilli)<span> which</span><span> increase cell surface area. These are cellular membranes that are microscopic in nature that increases the surface area of the cell for diffusion and minimize increase in volume.</span><span> </span>
