The trachea bifurcates, or divides, into two branches at its most distal portion and forms the bronchi. The bifurcation is reinforced by a cartilaginous plate called the carina. Like the trachea, each bronchus is made up of cartilaginous rings to keep the lumen open as it goes into the lung. As the branches get smaller, they are called secondary bronchi and segmental (or tertiary) bronchi.
Pins and Needles - Paraesthesia. The most common cause of pins and needles is a moderately pinched nerve. Pins and needles is referred to as paraesthesia in the medical community. Did you know that feeling pins and needles can actually be a worse sign than having pain in your arm or leg.
What Is It: Peripheral neuropathy is caused by damage to the nerves in the leg or foot, anywhere along their path from the spine down to the feet. It is the most common cause of burning pain in feet. Causes: Various medical conditions e.g. diabetes, injury e.g. fractures, infections e.g. shingles or medication. In approximately 30% of cases the cause is unknown