) a rhombus b) an inverted Greek capital letter delta
There are more than one: The deltoid, supraspinatus, infraspinatus, teres major and minor and the subscapularis.
The terms used to describe the shape of a muscle are; deltoid and rhomboid.
The primary muscles are the latissimus dorsi and the biceps brachii. Secondary muscles are the trapezius, brachioradialis, deltoid, teres major, rhomboid, rectus abdominus and obliques.
The deltoid muscle is located around the shoulder at the top. There is a deltoid muscle that is located on each shoulder.
The rhomboid muscles, often simply called the rhomboids, are rhombus-shaped muscles associated with the scapula and are chiefly responsible for its retraction. There are two rhomboid muscles: Rhomboid major muscle and Rhomboid minor muscle. They are located on the back that connects the scapula with the vertebrae of the spinal column.
A deltoid muscle is the muscle that forms the rounded part of the shoulder.
Inflammation of rhomboid's muscle
Deltoid tuberosity, a little prominence found midway on the lateral surface of the humerus. Right?
Deltoid
Serratis anterior
Traps
smooth muscle