The substantia nigra is a broad layer of cells with melanin. It is involved with the production of dopamine (a neurotransmitter in the brain). Dopamine functions to aid in the control of muscular reflexes.

. Numerous ducts open in a line along the floor of the mouth. Some of these ducts may fuse and form Bartholin's duct; which opens into or adjacent to Wharton's duct. Rivinu's ducts are also called the sublingual ducts

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The subclavius muscle is a muscle that helps connect the upper limb to the thoracic wall. The subclavius, is a small triangular shaped muscle, that spans between the first rib and the clavicle. It acts to stablize and depress the shoulder

The transverse humeral ligament is a broad band  of connective tissue. It passes from the greater tubercle to the lesser tubercle of the humerus; forming a bridge over the bicipital groove, protecting the long head of the biceps tendon.