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Myoglobin

Myoglobin is a globular, iron-containing protein that stores molecular oxygen in muscles and delivers it to the oxidative cell systems. Structurally…

Hemoglobin

Hemoglobin is the oxygen-carrying molecule of the red blood cells of vertebrates. This protein represents more than 95% of the solid constituents of…

Pyramidal Tract

The pyramidal tract is a pathway of cortical efferent fibers composed of billions of myelinated axons which arise from pyramidal neurons (Betz cells…

Circulatory System

The circulatory system is the complex network of blood vessels and lymphatic ducts concerned with the transport of blood and lymph throughout the bo…

Pulmonary Circulation

The pulmonary circulation is the uninterrupted flow of blood from the heart to the lungs, and from the lungs back into the heart. Also known as les…

South American Rattlesnake

Crotalus durissus is the scientific name of the South American rattlesnake . This venomous pit viper is the most dangerous snake in South America, e…

Cell Membrane

The cell membrane is a thin layer of lipid, cholesterol, and proteins surrounding the cell. It isolates and protects the cell contents, such as the …

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