The<unk>  is the muscle forming the rounded contour of the human shoulder. It is also known as the 'common shoulder muscle', particularly in other animals such as the domestic cat. Anatomically, the<unk>  appears to be made up of three distinct sets of muscle fibers, namely the # anterior or clavicular part (pars clavicularis) # posterior or scapular part (pars scapularis) # intermediate or acromial part (pars acromialis) However, electromyography suggests that it consists of at least seven groups that can be independently coordinated by the nervous system. It was previously called the<unk> eus (plural<unk> ei) and the name is still used by some anatomists. It is called so because it is in the shape of the Greek capital letter delta (Δ).<unk>  is also further shortened in slang as "delt". A study of 30 shoulders revealed an average mass of in humans, ranging from to .
Deltoid muscle
Subscapularis muscle
Latissimus dorsi muscle
Achilles tendon
Pulled hamstring
Superior oblique muscle
Pectus
Dilator