formed elements
red blood cells, white blood cells, platelets
The formed elements of blood are the cellular components that make up the majority of blood volume. These elements include red blood cells, white blood cells, and platelets.
1. Red blood cells (RBCs): Also known as erythrocytes, red blood cells are the most abundant formed element of blood. They contain a protein called hemoglobin, which binds to oxygen and transports it throughout the body. RBCs are produced in the bone marrow and have a lifespan of about 120 days.
2. White blood cells (WBCs): White blood cells, also known as leukocytes, are responsible for defending the body against infection and disease. There are several types of white blood cells, including neutrophils, lymphocytes, monocytes, eosinophils, and basophils. These cells are produced in the bone marrow and lymphatic tissues.
3. Platelets: Platelets, also known as thrombocytes, are small cell fragments that play a critical role in blood clotting. They are produced in the bone marrow and circulate in the blood, where they adhere to damaged blood vessels and help to form clots to seal the injured area.
Overall, the formed elements of blood work together to carry oxygen, fight infection, and prevent bleeding. Any disruption in the production or function of these elements can have serious health consequences.
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