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.
each person has a sex a gender and a gender identity these are all aspects of your sexuality they are all about who you are and they are all different but related sex is biologicalit includes our genetic makeup our hormones and our body parts especially our sex and reproductive organsgender refers to society s expectations about how we should think and act as girls and boys and women and menit is our biological social and legal status as women and men gender identity is how we feel about and express our gender and gender roles clothing behavior and personal appearanceex is biological it includes our genetic makeup our hormones and our body parts especially our sex and reproductive organs gender refers to society s expectations about how we should think and act as girls and boys and women and men