For optimal recall, itâs easiest to group the many causes of shortness of breath into five main categories: cardiac, pulmonary, central nervous system (CNS) abnormalities, neuromuscular disorders and those secondary to blood disorders.
Definition of: HAL(1) An interface between hardware and software. See hardware abstraction layer. (2) (Heuristic/ALgorithmic) The name of the computer that took over command of the spaceship in Stanley Kubrick's famous film 2001: A Space Odyssey..
Definition: Pallor is the paleness of skin and mucous membranes, due to the reduced amount of oxyhemoglobin or decreased peripheral perfusion. Sites to look for pallor: 1  Lower palpebral conjunctiva. 2  Tip and dorsum of the tongue. 3  Soft palate. 4  Nail beds. 5  Palmar or plantar creases. 6  General body skin.