Blood plasma is a light yellow liquid that makes up about half of a person’s blood. Blood plasma is vital for fighting infection, maintaining correct blood pH levels, helping blood to clot, and ...

Red blood cells are important mediators of the innate immune system. Depending on the cellular environment, these cells either activate the immune system or maintain the system in a dormant state. In ...

Check your knowledge of the heart and how blood is transported around the body by blood vessels ahead of your Higher Human Biology exam. Brush up on your knowledge of arteries, capillaries, veins and ...

Your heart is an amazing organ. It continuously pumps oxygen and nutrient-rich blood throughout your body to sustain life. This fist-sized powerhouse beats (expands and contracts) 100,000 times per ...

A key diagnostic step in disease detection is analyzing blood components. Accurate separation of blood cells from plasma, which holds proteins and other constituents, is crucial in many assays. First ...

Blood tests can help a doctor diagnose a variety of health conditions, including infections, anemia, high cholesterol, vitamin deficiencies, organ failure, HIV, cancer, and diabetes. Doctors use blood ...