The Circulatory System

The circulatory system has the major function of circulating blood that transports oxygen and nutrients throughout the body. Major organs are the lungs, heart, and blood vessels. The functional unit are the red blood cells. Red Blood Cell Mammals have a closed circulatory system called the cardiovascular system. The heart has one or two atria, [...]

Environmental Science – Astronomy: Stars

Stars are large incandescent bodies. Stars radiate electromagnetic, heat, and light energy which produces their light. Hotter stars glow with shorter wavelength lights making them blue in color. Stars are held together by gravity. Hydrogen combines through fusion reactions producing energy and forming Helium. The lifestyle of a star is as shown below: Stars begin [...]