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Mast Cell

Immune cells that function to detect foreign substances in the tissue spaces and initiate local inflammatory responses against them

Albumin

Most abundant plasma protein

Thrombus

Clot that develops and persists in an unbroken blood vessel

Deoxyhemoglobin

Hemoglobin that has detached oxygen and is returned to its original shape; reduced hemoglobin

Reticulocytes

Immature erythrocytes

Hematocrit

Percentage of erythrocytes in total blood volume

Erythrocytes

Red Blood Cells

Plasma

Nonliving fluid component of blood; contains formed elements and dissolved solutes

Histamine

Causes vasodilation and increases vascular permeability

Hemopoiesis

Blood cell formation

Hemostasis

Stoppage of bleeding

Buffy Coat

Whitish layer present at the erythrocyte-plasma junction that contains leukocytes and platelets

Platelets

Cell fragments involved in clotting

Leukocytes

White blood cells

Diapedesis

Passage of blood cells through intact vessel walls into tissue

Serotonin

Chemical that enhances vascular spasm

Neutrophils

Most abundant type of white blood cell

Erythropoiesis

Process of erythrocyte formation

Leukopoiesis

The production of white blood cells

Formed Elements

Living blood cells; platelets, leukocytes, and erythrocytes

Coagulation

Process in which blood is transformed from a liquid to a gel

Oxyhemoglobin

When oxygen binds to the oxygen molecules on the hemoglobin found within the red blood cell

Hemoglobin

Oxygen-transporting component of erythrocytes

Heparin

Anticoagulant secreted into blood plasma

Embolus

Occurs if a thrombus breaks away from the vessel wall and floats freely within the blood stream

Polycythemia

An excessive or abnormal increase in the number of erythrocytes

Hemocytoblast

Bone marrow cell that gives rise to all formed elements

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