-READ THE TEXT AND MATCH THE SENTENCES (LEER EL TEXTO Y EMPAREJAR LAS FRASES) YOUR SKELETON SYSTEM The adult human body has two hundred and six bones The adult skeleton consist of the following bones: Twenty eight skull bones(eight cranial, fourteenfacial,and six ear bones). The hyoid bone in the neck is the only bone that does not articulate to another bone. Twenty six vertebrae(seven cervical, twelve thoracic, five lumbar, the sacrum, which is one single bone. made of five fused vertebrae, and the coccyx, which is one bone made of four fused vertebrae). Twenty four ribs plus the sternum, two clavicles, the most frequently fractured bone in the body and two scapulae. Two pelvic bones. Thirty bones in each of the arms and legs (a total of one hundred and twenty ) YOUR RESPIRATORY SYSTEM The respiratory system makes braething Your body needs oxigen to survive. You get oxygent from the air around you . Your lungs are the most important organs of the respiratory system. They are situated in the chest cavity. They sit on the diaphragm. When we breathe, air is taken in through the mouth and nose and travels down the throat into the windpipe. Air is taken into the lungs through two large tubes called bronchi. One bronchus is connected to the left lung and one is connected to the right lung. The left lung is smaller to make room for the heart. When oxygen –rich air reaches your lungs, oxygen is absorbed into the blood through tiny blood vessels. Then, the oxygen is taken to different parts of your body along the circulatory system. Carbone dioxide, which we do not need, is expelled, It exits your body in the air you exhale through your nose and mouth.
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