The lecture PowerPoint and the text had great step-by step pictures that demonstrated how the heart valves ensured one-way blood flow through the heart.
Nurse's Note: Why it matters and how to apply it as a nurse: A problem with the right side of the heart not functioning properly will result in swelling or edema throughout the body whereas a problem with the left side of the heart will typically result in an issue of congestion in the lungs.
Just another amazing trait of the human body! The venous valves are formed from folds of the tunica intima, the innermost layer of the vein. These valves close as needed to aid in returning the blood from the limbs back to the heart to be reoxygenated.
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