Pectoralis Majo Diagram. This muscle extends from three origins on the third fourth and fifth ribs on. As you can see in the diagram above the horizontal sternum forms a t with the.
It is the largest and most ventral flight muscle. Pectoralis major the pectoralis major from latin pectus breast is a thick fan shaped muscle situated at the chest of the human body. It makes up the bulk of the chest muscles and lies under the breast.
The upper part is known.
A typical ultrasound image of pectoralis major. This large fan shaped muscle stretches from the armpit up to the collarbone and down across the lower chest region on both sides of. The first avian solution was to add a vertical keel to the sternum. The pectoralis major is involved in a variety of arm movements such as adduction internal rotation flexion and extension.