Appendix, Has no uses. Plus it can kill you if it gets inflamed and you get appendicitis. So it is pretty much a time bomb waiting to happen.
I think it might be waste / waist
recent medical studies have shown that vitamin pills, for the most part, are useless and contribute very little to one's health.
It is useless, they're just dead cells. If they were alive, cutting your hair would hurt.
It is the brain part of the human body that contains the most neonates.
The brain is considered the most used body part, while the heart is often considered the second most used body part because it constantly pumps blood throughout the body.
The most sensitive part of a dog's body is typically their nose.
The most important part of the Circulatory Sytem is the capillaries.
The most inferior part of the human body is the foot. The most superior is the head.
The word "useless" is an adjective. It describes something as lacking use or value.
The heart is part of the cardio-vascular system. It is the most important part of the system since the heart is a pump which regulates the flow of blood through all the vasculature. Without the heart, blood vessels would simply become useless, empty tubes.
appendix
The eye.