<span>Kidneys
When you digest a protein, the body breaks down the protein into amino acids which the body then uses to build new proteins. But if there is an excess of amino acids, the body isn't capable of storing those excess amino acids for future use. So the body breaks down the amino acids into glucose, ketones, hydrocarbons and nitrogenous waste. The nitrogenous wastes are then converted to urea by the liver and the urea is extracted from the blood stream by the kidneys and expelled from the body.</span>
Cells are the smallest objects biologists study
Yes, if it is the same group you can identify them by smaller features or smaller differances.
This is your answer I hope this answers your question and that you have amice rest of your Sunday: Cardiac muscle is an exception among involuntary muscles, which are characteristically smooth. Its contractile fibers resemble those of skeletal muscle but are only one third as large in diameter, are richer in sarcoplasm, and contain centrally located instead of peripheral nuclei.
