there are two muscles with pectoralis in their name, Pectoralis Major and Pectoralis Minor. Pectoralis Major is the main muscle of the chest and pectoralis minor is deep to it (so you can't feel it because pectoralis major completely covers it)
Pectoralis minor.
pectoralis minor and subclavius muscle.
The heart is deep to the pectoralis major. That muscle is superficial to the heart.
shoulder: deltoid. Chest: Pectoralis major
No, it is not. It is the large chest muscle.
major pectoralis
shoulder horizontal flexion
the shin muscle
anterior
The largest chest muscle in a cat's body is the pectoralis minor. In humans, the largest chest muscle if the pectoralis major.
pectoralis major