Introduction to Evolution: Charles Darwin and Alfred Russel Wallace

An Introduction to Evolution and Natural Selection: the history behind it with famous evolutionists Charles Darwin and Alfred Russel Wallace

Circulatory System: Heart Structures and Functions

Circulatory System: Heart Structures and Functions; Blood flows through the heart in the following order: body –>inferior/superior vena cava –> right atrium –> tricuspid valve –> right ventricle –> pulmonary arteries –> lungs –> pulmonary veins –> left atrium –> mitral valve –> left ventricle –> aortic valve –> aorta –> body…