للافاده موقع مجانى يقدم كورسات اون لاين للغه الانجليزيه والله العظيم مجانى

[alamir2001]

muscles of breathing we discussed the accessory muscles of the upper chest—the rhomboids and the pectoralis minor. This Scientific Key looks at the accessory muscles of the lower chest and abdomen, specifically the rectus abdominus, quadratus lumborum and the psoas. Let’s look at each of these muscles in turn.