The BLOOD undergoes a number of normal changes across the span of the lifetime. Blood cells have life spans ranging from a few hours to decades. The blood continually renews itself, producing millions of erythrocytes and thousands of leukocytes every hour. Blood cell production accelerates to meet unique health needs, such as PREGNANCY or INFECTION. The LIVER is the first organ in the developing fetus to produce blood cells, primarily erythrocytes, with
What is Albumin and Definition Albumin - the most abundant protein in PLASMA. Albumin transports various molecules through the BLOOD and helps sustain the blood’s oncotic pressure, keeping fluid from seeping into the tissues. Albumin molecules are larger than the molecules it transports, allowing those substances, such as electrolytes and hormones, to pass through the walls of the blood vessels while the albumin molecules remain within the blood
What is Anemia and Definition A reduced ability of the BLOOD to meet the body’s oxygenation needs arising from either a diminished volume of erythrocytes (red blood cells) in the blood or from reduced HEMOGLOBIN content in the erythrocytes. Though the common perception of anemia is that it is itself a health condition, doctors consider anemia an indication of other health conditions. Diagnosis and treatment target those underlying conditions.
Blood - the cell-filled fluid that carries vital chemicals and NUTRIENTS via the cardiovascular system to tissues and cells throughout the body. The HEART pumps the blood, sending it under pressure through a closed network of arteries and veins. The blood provides volume within the cardiovascular system, establishing both BLOOD PRESSURE and osmotic pressure (the pressure that keeps fluid within the blood vessels). The blood carries oxygen and nourishment
What is Blood donation and Definition Blood Donation is the procedure of withdrawing BLOOD to prepare and use for BLOOD TRANSFUSION. Volunteer donors provide all human blood and blood products used for transfusions. According to the American Association of Blood Banks, 8 million Americans donate 15 million units of blood each year. Because blood banks separate the majority of donated blood into component blood products, one unit of donated whole blood
What are Blood Stem Cells The parent cells from which all BLOOD cells arise. Blood stem cells are pluripotent or undifferentiated, which means they have the ability to become any of the three types of blood cells (erythrocytes, leukocytes, or platelets). Intricate biochemical interactions determine how the blood stem cell will differentiate (become a specific type of blood cell). Blood stem cells reside primarily in the BONE MARROW and the LYMPH tissues
Blood transfusion is a therapeutic procedure to administer BLOOD or blood products. Blood transfusions may be autologous (self-donated), when the timing of the need for blood permits planning, or allogeneic (volunteer donor). The transfusion of blood or blood products takes place intravenously, through a sterile needle inserted into a VEIN. Receiving a transfusion may take 10 to 20 minutes, depending on the blood product, condition of the
Blood Type - the pattern of specialized proteins, called agglutinogens or antigens, present on the surface of the red BLOOD cells (erythrocytes). The presence of antigens on the erythrocytes causes the IMMUNE SYSTEM to create oppositional antibodies, which will attack cells bearing the opposing antigens. Antigens and corresponding antibodies begin to develop shortly following birth. The discovery of blood types in the early 1900s made successful BLOOD