Intercostal muscles are a group of muscles found in between the ribs and their function is to create and move the chest wall during the breathing process. The muscles are broken down into three layers namely; external intercostal muscles, internal intercostal muscles, and the innermost intercostal muscles.
The muscles responsible for elevation of the ribs are then the external intercostal muscles
Answer:each of a number of flattened sacs inside a chloroplast, bounded by pigmented membranes on which the light reactions of photosynthesis take place, and arranged in stacks or grana.
