Schematic illustration of the respiratory components of the lower brainstem (pons and medulla oblongata). PNC = pneumotaxic center; APC = apneustic center; DRG = dorsal respiratory group; VRG = ventral respiratory group; CC = central chemoreceptors.egulation of Breathing. The regulation of breathing is based in the body's acid/base balance. The Central Chemoreceptors (CCR), primarily responsible for the breathing stimulation, are affected by the PaCO 2.
Flexor tendons in the hand and forearm. The muscles that bend or flex the fingers are called flexor muscles. Deep cuts on the palm side of the wrist, hand, or fingers can injure the flexor tendons and nearby nerves and blood vessels.
The wrist is formed where the two bones of the forearm â the radius (the larger bone on the thumb side of the arm) and the ulna (the smaller bone on the pinky side) â meet the carpus. Rather than a single joint, the wrist is actually made up of multiple joints where the bones of the arm and hand meet to allow movement.The carpus is formed from eight small bones collectively referred to as the carpal bones.The carpal bones are bound in two groups of four bones:he hand and wrist are made up of many different bones, muscles and ligaments that enable a wide range of movements. The following are the main structures of the hands: