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.
Causes of Similar Symptoms to Burning Legs. Research the causes of these symptoms that are similar to, or related to, the symptom Burning Legs: 1  Foot pain (206 causes). 2  Tingling feet (54 causes). 3  Tingling toes (16 causes). 4  Burning toes. 5  Leg pain (214 causes). 6  Leg symptoms (2751 causes). 7  Foot symptoms (2265 causes). 8  Toe symptoms (1171 causes).