The platysma is a superficial muscle that overlaps the sternocleidomastoid. It is a broad sheet arising from the fascia covering the upper parts of the pectoralis major and deltoid; its fibers cross the clavicle, and proceed obliquely upward and medially along the side of the neck.
For example genetic differences, females inherit X chromosomes from their father giving them a genetic make-up of XX, while males inherit a Y chromosome from their father, thus giving them a genetic make-up of XY.
Gender identity is oneâs psychological awareness, sense, or concept of self as either a male or female. As for self-concept, gender identity is the most obvious aspect. Gender identity may be the same or different from oneâs anatomic or assigned sex.