FIGURE 1-11 Body Cavities. (a) The dorsal body cavity is bounded by the bones of the skull and vertebral column. The muscular diaphragm divides the ventral body cavity into a superior thoracic (chest) cavity and an inferior abdominopelvic cavity.he Thoracic Cavity The walls of the thoracic cavity surround the lungs and heart; associated organs of the respiratory, cardiovascular, and lymphatic systems; the inferior portions of the esophagus; and the thymus.
Half marathon. A half marathon is a road running event of 21.0975 kilometres (13.1094 mi) â half the distance of a marathon. Participation in half marathons has grown steadily since 2003, partly due to the fact that it is a challenging distance, but does not require the same level of training that a marathon does.
Half Marathon Beginning Run. If this is your first half marathon and you want to train to run the half marathon, this is the Half Marathon Training Plan for you! It will take you from a 4 mile run to the start line and finish line of the half marathon. Week by week, you will gradually progress your mileage to running 10 miles in preparation for the race. The key is in the recipe that includes a perfect blend of running easy days, long endurance runs, cross-training and rest.