Marzano Activity

Shark Attack

(Summarizing and Note-taking)

Read the story on this website: http://www.sciencecases.org/shark/shark.asp

Answer the following questions:

1. Identify at least five organ systems in this region of the arm that the surgeon would have marked for reattachment. Circulatory, skeletal, lymphatic, nervous, integumentary, and muscular.

2. List the names of the specific structures that had to be reattached.   Humerus Biceps brachii, brachialis, triceps, tendon of the coracobrachialis and/or part of the brachioradialis (depending on exact location of bite).

3. What organ system was most likely not reattached? Explain. Lymphatic, since the vessels are very small and hard to find.  Also the surgeons need to get the blood flowing as quickly as possible and not take the time to reattach the lymphatic vessels, which are not as critical.

4. Why was a clean bite so important? If the sharks teeth were rigged then they would make ends of blood vessels and nerves difficult to identify and put together, while clean edges would facilitate identification and reattachment.

5. Why was the bone shortened? To cut off the damaged area and to avoid stretching the severed blood vessels and nerves.

6. Identify the movements associated with the arm, forearm, wrist, and fingers. Flexion, extension, abduction, adduction, grasping, and mobility of individual fingers.

7. Explain how the movements of the reattached arm might be altered after the reattachment. Decreased, because not all nerve fibers are reconnected or can regenerate.

8. Define collateral circulation and identify the regions of collateral circulation that would be found in the upper extremity. Collateral circulation is defined as multiple circulation paths supplying a particular area.  The regions of collateral circulation in the upper extremity are around the scapula, the head of the humerus, the elbow, wrist, and hand.

9. Identify the specific vessels that provide the...