Eventually, the bronchi become known as bronchioles â the smallest air tubes in the lungs. This system of air tubes can be thought of as an upside down tree, with the trachea being the main trunk and the bronchi and bronchioles being the branches. The medical term for all the air tubes is 'the respiratory tract'.
An injury to the vertebrae or discs in your neck can cause pain, numbness, or weakness in your shoulder, arm, wrist, or hand because the nerves that extend out from between the neck provide sensation and allow for movement in these areas.
When people are stressed, their blood flow is redirected so that more blood goes to their large muscles and less goes to their extremities (this supplies more oxygen to the large muscles so that you can either run away or fight back). The lack of blood flow causes your hands to feel cold. Views Â· View Upvotes.