· The head, which is located at the top of the body, possesses hair, the face, and other superficial features. These include the eyes, ears, the nose, and mouth. Attached to the head is the neck which connects it to the torso and allows for the range of motion of the head to obtain a better field of view.
· The torso, which is the largest of the superficial parts of human body, is the place to which other limbs connect. This includes the head and neck, both arms and both legs. For men, the penis and testicles are also connected to the torso. For women, the breasts are located on the torso.
· The arms, which are connected to the torso, allow for people to reach items, carry them and other activities. Attached to these human body parts are the hands and fingers. The arms are segmented by the elbows and wrists.
· The legs, which are also attached the torso, allow for mobility via walking. Attached to the legs are the feet and toes. The legs are segmented by the knees and ankles.
Concealed underneath the skin and within the superficial human body parts are the internal structures which carry out other functions. These parts of human body include bones, muscles, organs, tissues and cells.
· Bones give the body its structure and rigidity allowing people to stand upright and walk, while also offering protection for internal organs.
· Muscles are located allow over the body and provide strength and mobility for the body.
· The internal organs of the body process nutrition, send blood and oxygen through the body, send signals to regulate body functions, and filter out waste from the body.
· Tissues are the layers that compose muscles regardless of their size.
· Cells are the smallest of the human body parts as they compose each other part including tissues, muscles, bones, organs and the superficial features.
Each of the human body parts, whether superficial or internal, work together to allow homo sapiens to function properly. However, not all body parts are necessary for the body to operate. These are called vestigial structures which, through evolution, have ceased to function but do not have a negative effect. Examples of these non-functional human body parts are the appendix, the coccyx (tail bone) and the muscles of the ear.