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Terms in this set (63)
What are the main components of the Blood, spleen, bone marrow, liver, thymus gland,
hematologic system? lungs, kidneys, heart.
What is hematology? The study of blood and the disorders related to it.
What are the primary functions of Transports oxygen, nutrients, metabolic waste
blood? products; regulates body temperature, signal
transmission, acid-base homeostasis, and immune
response.
How much blood does an adult Approximately 5 liters.
weighing 70 kg have?
What percentage of blood is made up 45% cellular components and 55% plasma.
of cellular components and plasma?
What is the composition of plasma? 92% water, with albumin, serum globulins, fibrinogen,
prothrombin, and plasminogen.
What are the three major cell types in Red blood cells (erythrocytes), white blood cells
blood? (leukocytes), and platelets (thrombocytes).
What is the lifespan of red blood cells About 120 days.
(RBCs)?
What is the primary function of red Transport oxygen and carbon dioxide between lungs
blood cells? and tissues.
, What can cause low levels of red Anemia, bleeding, destruction of RBCs, leukemias,
blood cells? malnutrition, overhydration.
What can cause high levels of red Heart failure, hypoxia, dehydration, polycythemia.
blood cells?
What is hemoglobin? An iron-containing protein in RBCs that transports
oxygen.
What are the normal hemoglobin Males: 13.5-17.5 g/dL; Females: 12-16 g/dL.
levels for males and females?
What does hematocrit measure? The proportion of blood occupied by red blood
cells.
What is the normal range for Males: 41%-53%; Females: 36%-46%.
hematocrit in males and females?
What is the lifespan of platelets? 7-10 days.
What is the normal platelet count 150,000-450,000.
range?
What can cause high platelet counts? Infection, inflammation, cancer, removal of spleen.
What is the significance of a platelet Treatment with steroids may be necessary; <20,000 is
count below 50,000? concerning for bleeding.
What are neutrophils responsible for? Fighting bacteria, viruses, and fungi; first line of
defense.
What is the function of lymphocytes? Targeting viruses and foreign materials.
What does PT stand for and what does Prothrombin time; measures the time it takes for
it measure? blood to clot.