The answer is the epiglottis
<em>The function of the excretory system is </em><em>to remove waste from the body, or any unnecessary materials not kept by storage functions. It is important because it helps maintain homeostasis within organisms</em>
<em>Organs that this system includes are </em><em>the skin, the kidneys, the large intestines, the liver, and the lungs.</em>
Endoscopes can be passed into the large intestine (colon) through the rectum to examine this area of the intestine. This procedure is called sigmoidoscopy or colonoscopy depending on how far up the colon is examined.
Protein digestion would be more difficult because of that buffering action of sodium bicarbonate on the stomach acid, which alters the optimum pH for the action of pepsin, a major protein-digester
is this a real question? let me guess you are a boy?