. Laboratory problems in civic biology. Biology. PROBLEM 199 233 preserve it. We have said that blood is made, in part at least, of digested foods. In the bottle containing the clotted blood notice the soUd part, the clot, and a yellowish liquid called serum. Pour off some of the serum into each of three test tubes. Test the first with iodine solution. â Result ? Test the second with Fehling's solution. â Result? Test the third with nitric acid and ammonia. What is the result ? Test some of the blood fibrin with nitric acid and ammonia. Observations. â Note what happens in each of the three tu
. Laboratory problems in civic biology. Biology. PROBLEM 199 233 preserve it. We have said that blood is made, in part at least, of digested foods. In the bottle containing the clotted blood notice the soUd part, the clot, and a yellowish liquid called serum. Pour off some of the serum into each of three test tubes. Test the first with iodine solution. â Result ? Test the second with Fehling's solution. â Result? Test the third with nitric acid and ammonia. What is the result ? Test some of the blood fibrin with nitric acid and ammonia. Observations. â Note what happens in each of the three tubes. What is fibrin? Conclusion. â 1. What nutrients are present in blood serum? 2. Of what is fibrin composed ? 3. What nutrients are present in blood? Note. ââ The blood clot is composed in part of structures (largely protein) known as corpuscles. These can better be seen in prepared specimens under the compound microscope. Frobletn 199: To study the corpuscles of the blood. a. In Frog NOTE. â Blood is composed of two principal parts, solid bodies (corpuscles) and a liquid (plasma). Materials. â Frogs, glass slide, cover glasses, microscope. Method. ââ Place some frog's blood on a glass slide, cover and examine under a compound microscope. (See figure.) Observations. â What are the color and shape of the corpuscles that are most numerous and most easily seen? These are red corpuscles. There are other irregular-shaped cor- puscles, more transparent and not so easily seen. These are the colorless cor- puscles. Conclusion. â 1. What kinds of corpuscles did you find? 2. Are corpuscles cellsf Can you prove your statement?. Corpuscle of Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Hunter, George William, 1873-1948. New York, Cincinnati [etc. ] American Book Company
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