By Robert Gardner
How do joints paintings? How do feel receptors paintings? What kind of character do you will have? examine the solutions to those questions and extra with the thrill experiments during this publication. younger scientists will discover human physique platforms and behaviour. Many experiments comprise rules you should use to your technology reasonable. know about the clinical procedure, too!
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What does this tell you about the density of chicken bone? Do you think the bone of a seagull would be more or less dense than a chicken bone? What makes you think so? 4 beside the jar. Vinegar is an acid. It will slowly dissolve the minerals in bone. These minerals constitute about two thirds of a bone’s weight. Organic matter—bone and cartilage and blood vessel cells—make up the remaining third. After several days, remove the bone from the jar. How does its flexibility compare with that of the dry bones you left beside the jar?
In what other places on your body can you find a pulse? If you find a pulse at a point on the left side of your body, can you always find a pulse on the corresponding point on the right side? Place the fingers of one hand on a friend’s wrist pulse. Place the fingers of your other hand on the pulse in front of your friend’s ear. Do you expect to feel both pulses at the same time or to feel one pulse before the other? What do you find? How can you explain the results of this experiment? If you take your friend’s pulse at both his neck and his wrist, which pulse do you expect to feel first?
Place your forearm on a table, palm side up. Put a small lump of clay on the skin that lies directly over the point where you feel your strongest pulse. Stick a straw in the clay as shown in Figure 14b. Watch the top of the straw. You will see it move with each beat of your heart. FIGURE 14: 14a) A pulse can be felt on the inside of your wrist just behind your thumb. b) You can use a lump of clay and a drinking straw to amplify your pulse and make it visible. You can find a pulse on any artery that is close to the surface of the body.