Lab 9 - Rat Anatomy - Anil Kanungo BIO 206L Thursday 6-10pm...

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4/5/2007 Anil Kanungo BIO 206L Thursday 6-10pm Lab #8: Anatomy of the Rat Results and Analysis: 1.) Trace the pathway of a rat’s meal and its nutrient products of digestion from the oral cavity to a muscle cell in the rat’s leg. What molecule must be picked up along this path way in order for the muscle cell to obtain energy from the food molecules and where is this molecule absorbed into the blood? From the oral cavity, food travels towards the pharynx, into the esophagus and down to the stomach. Next, muscles move the food from the stomach to the small intestine. It travels through the small intestine, where nutrients are absorbed into the blood and delivered to parts of the body. Glucose and oxygen must be picked up along this pathway in order for the muscle cell to obtain energy. 2.) Why are the liver, kidney, and spleen colored a dark red or reddish-brown? (Actually, dark blue in the injected rats). What are the functions of these organs and how do these functions relate to their color? The role these organs play in metabolism cause them to be dark red or reddish-brown. There is a high amount of blood flow in these organs. The liver produces bile which is important to digestion, the kidneys filter wastes from the blood, and the spleen functions in the destruction of old red blood cells.
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