Answer: However, during exercise, many other muscles become important to respiration. During inspiration, the external intercostals raise the lower ribs up and out, increasing the lateral and anteroposterior dimensions of the thorax.
The answer is A. Walking is the ideal work out before a run because it gets your body from sitting mode into workout mode in the least intense way. The motion of walking takes the muscles, tendons, and joints through a range of motion similar to what it will go through in running.
It could be widows peak, earlobe attachment, and cleft chin.
Carbon,hydrogen, & oxygen
