Examlex
Which of the following describes the form of culture change known as diffusion?
Pulmonary Semilunar Valve
A valve in the heart located between the right ventricle and the pulmonary artery that prevents backflow of blood into the heart during ventricular relaxation.
Aortic Semilunar Valve
A valve in the heart situated between the left ventricle and the aorta that prevents blood from flowing back into the heart.
Pericardium
The pericardium is the fibrous sac that encloses the heart, providing it protection and the lubrication needed for its movements.
Lubrication
The process or technique of using a lubricant to reduce friction and wear between two surfaces in contact.
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