Lab 6

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Metropolitan Community College, Kansas City *

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MISC

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Biology

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Jan 9, 2024

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pdf

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1 Module 6 Lab-Class Use your text as a reference for the following exercises . Part 1: Respiratory System 1. Slides Obtain a slide of normal lung tissue. Include a picture or drawing of your sample. What type of tissue makes up the alveoli?

2 The alveoli are made up of simple squamous epithelium for greater diffusion rates.

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4 2. Lung model. Use your text as you study the lung model. Locate the trachea, primary bronchi, and secondary bronchi, and other structures visible on the model. 3. Sheep Lung Dissection A. Carefully examine the gross anatomy of the sheep pluck with particular attention to the lungs. Are there any observable differences between the sheep lungs used in this lab and the human lung illustrations/dissections in the textbook? Explain. One of the bronchi comes directly from the trachea before it splits in two. The right lobe has four lobes, compared to three in humans. B. Use the Lung Dissection Video (class) to help identify and label the structures listed below. Use pins to label the structures and include pictures of the labeled dissection specimen below. 1. Pleurae 2. Trachea 3. Tracheal cartilage 4. Carina 5. Right lung 6. Left lung 7. Hilum 8. Pulmonary artery 9. Pulmonary vein 10. Cardiac impression 11. Lobes (identify each) 12. Right primary bronchus 13. Left primary bronchus 14. Lobar bronchus 15.

5 Part 2: The Kidneys 1. Microscopic structure A. Obtain a microscope and a slide of a cross section of the kidney. Begin at the 4X power objective. As you look through the microscope, you should notice that some areas look quite different than other areas. In some areas you will notice tubules with simple cuboidal epithelium. Focus on one of the tubules and use the 10X objective, then the 40X objective. In other areas you will be able to locate a glomerulus. Move up to the 10X then the 40X objective. You should be able to discern the simple squamous epithelium if you look carefully and use the iris diaphragm lever to increase the contrast. Go back to the 4X objective and look for arteries. You should be able to locate an artery and increase the magnification to 10X or 40X to observe the blood cells within. Obtain a slide of the bladder. Locate the transitional epithelium. What is the function of transitional epithelium? The transitional epithelium is there so that the bladder can expand. 2. Kidney Models A. On the large kidney model, locate the renal artery and renal vein. Also locate the ureter and study the artist’s drawing of a nephron. A nephron would actually be microscopic, but the drawing gives you an idea of where the glomerulus and loop of Henle would be located in the cortex. Locate the cortex, medulla and renal pelvis. B. On the wedge kidney model, you will notice many glomerular (Bowman’s) capsules. A couple of them have been cut open to display the glomerulus. Locate the following: glomerular capsule, proximal convoluted tubule, loop of Henle, distal convoluted tubule, collecting duct, and the peritubular capillaries. 3. Kidney Dissection A. Use the Kidney Dissection Video (class) to help identify and label the structures listed below. Use pins to label the structures and paste pictures of the labeled dissection specimen below. A. Capsule B. Hilum C. Renal artery D. Renal vein E. Ureter F. Renal cortex G. Renal medulla H. Renal column I. Renal lobe J. Renal pyramid K. Renal papilla L. Minor calyx M. Major calyx N. Renal pelvis

6 O. Segmental artery P. Interlobar artery

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