CyanosisA bluish or purplish discoloration of the skin and mucous membranes due to an increase in the amount of deoxygenated hemoglobin in the blood or a structural defect in the hemoglobin molecule.
SkinThe outer covering of the body that protects it from the environment. It is composed of the DERMIS and the EPIDERMIS.
MembranesThin layers of tissue which cover parts of the body, separate adjacent cavities, or connect adjacent structures.
BloodThe body fluid that circulates in the vascular system (BLOOD VESSELS). Whole blood includes PLASMA and BLOOD CELLS.
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