Hair resists the decomposition process, and different types of hair have different degrees of resistance. Hair has an exterior cuticle composed of scales that overlap and protect the hair from the normal mechanisms that lead to decomposition, according to the U.S. Department of Energy.
Decomposition is the process of tissue breaking down after a plant or animal has died. Within 72 hours after death, some tissues begin to decay and bacteria start feeding on the dead tissue. In turn, the bacteria release gas that makes the tissues bloat, pushing fluids out and drawing flies and maggots in, according to Forbes. However, the cuticle around the hair protects it from this bacterial invasion, which is why hair from historical figures such as Copernicus and George Washington is still in museums.Learn More
The skin belongs to the integumentary system. It is an organ designed to protect the body from outside harm and is the largest organ system in the human body.Full Answer >
In a large number of species, the reproductive system hosts organs and systems, such as gonads, needed for successful reproduction and also secretes sex hormones such as progesterone and testosterone, notes Wikipedia. In addition, the female of many species come with specialized structures for nourishing and protecting offspring until birth.Full Answer >
The torso is the main part of the body to which the neck and limbs attach, and it is a common feature of all vertebrates. The torso holds the body’s major internal organs except for the brain. Often, scientists refer to either the lower torso or the upper torso for better clarity.Full Answer >
The heart has two ventricles, which primarily pump blood to the entire body, explains Regina Bailey on About.com. These are the lower two chambers of the heart, and they are separated by a septum into the left and right ventricle.Full Answer >