Blood Components, Functions, and Diseases: A Veterinary Perspective

What is blood?

A fluid connective tissue that transports information and products throughout the body, primarily oxygen and carbon dioxide.

What is the difference between whole blood and peripheral blood?

Whole blood is contained in the cardiovascular system, while peripheral blood is found on the outskirts, carrying oxygen, nutrients, and waste.

What are the components of whole blood?

Whole blood includes all cells, the liquid portion, and coagulation factors.

What are packed red blood cells (PRBCs)?

PRBCs are blood that has been spun down to remove the plasma, leaving only red blood cells.

What is fresh frozen plasma (FFP)?

FFP is plasma that has been separated from packed red blood cells and frozen.

What color is blood, and why does it appear bluish in veins?

Blood is technically clear but appears crimson red due to its components; it looks bluish in veins due to light refraction.

What is plasma?

The clear liquid portion of blood that suspends cellular components and contains proteins, clotting factors, ions, nutrients, waste products, gases, and regulatory substances.

What is the difference between plasma and serum?

Plasma contains clotting factors, while serum is the liquid portion of blood without clotting factors.

What is hematopoiesis?

The formation of blood cells, which occurs in the bone marrow.

What are the two types of bone marrow?

Red marrow, which actively produces red blood cells, and yellow marrow, which is fatty and can convert back to red marrow.

What are the three types of blood cell formation?

Erythropoiesis (red blood cells), thrombopoiesis (platelets), and leukopoiesis (white blood cells).

What is the role of erythropoietin?

Erythropoietin is a hormone produced by the kidneys that stimulates the bone marrow to produce red blood cells.

What factors influence erythropoiesis?

Hormones and the availability of iron, folic acid, vitamin B12, and proteins.

What is hypoxia?

A condition of low oxygen levels in the body that increases the production of red blood cells.

What are reticulocytes?

Immature red blood cells that are released into the bloodstream during increased erythropoiesis.

What is thrombopoiesis?

The production of platelets or thrombocytes from megakaryocytes.

What are megakaryocytes?

Large bone marrow cells that fragment to form platelets.

What happens to blood after it clots?

Once blood clots, it cannot be unclotted.

What is icterus?

A yellow color in plasma caused by bilirubin, indicating potential liver or gallbladder issues.

What does hemolyzed blood look like?

Hemolyzed blood appears reddish due to broken down red blood cells, often caused by mishandling or conditions like hemolytic anemia.

What is lipemic plasma?

Plasma that appears pinkish due to excess fat in the serum, often after a fatty meal.

What is the role of the spleen in blood management?

The spleen acts as a blood reservoir, storing red blood cells and releasing them during massive blood loss.

What are pluripotent cells?

Primitive stem cells that can differentiate into various types of blood cells.

What is the process of erythropoiesis?

The creation of red blood cells, which takes about a week in dogs and varies in other species.

What is the significance of the bone marrow in blood cell production?

The bone marrow is the primary site for blood cell formation, and issues here can lead to serious health problems.

What type of cell is a megakaryocyte?

A multinucleated cell that never leaves the bone marrow and releases cytoplasm to form platelets.

What is leukopoiesis?

The formation of white blood cells, which is more complex than erythropoiesis due to the variety of white blood cell types.

What are the three types of granulocytes?

Neutrophils, eosinophils, and basophils.

What is the function of neutrophils?

They account for 40-75% of circulating WBCs and are involved in the early stages of inflammatory response.

What is the role of lymphocytes in the immune system?

They are responsible for adaptive immunity, including T lymphocytes that activate B lymphocytes and produce memory cells.

What are the two types of lymphocytes?

T lymphocytes and B lymphocytes.

What is the function of B lymphocytes?

They are responsible for antibody creation and can form memory cells for quicker responses to pathogens.

What is the primary function of red blood cells (RBCs)?

To transport oxygen to tissues and carry carbon dioxide to the lungs.

What is hemoglobin?

A protein in red blood cells composed of four globin chains and four heme units, essential for oxygen transport.

What condition is caused by methemoglobinemia?

It occurs when hemoglobin cannot release oxygen, leading to hypoxia and a purple coloration in the animal.

What are thrombocytes?

Cell fragments derived from megakaryocytes that are involved in clotting and maintaining hemostasis.

What is the primary function of plasma in blood?

To transport nutrients, waste, hormones, and assist in regulating body temperature and fluid content.

What is the significance of the central pallor in red blood cells?

It is a dip in the RBC structure that helps maintain cell shape for maximum surface area.

What are the functions of eosinophils?

They are involved in phagocytosis, inflammatory responses, and immunity, particularly against parasites.

What is the role of basophils?

They are the least common WBCs, containing granules with histamine and heparin, and their functions are not well understood.

What is IMHA?

Immune-mediated hemolytic anemia, a condition where the immune system attacks red blood cells, causing anemia.

What is IMTP?

Immune-mediated thrombocytopenia, a condition where the immune system attacks platelets, leading to clotting issues.

What is lymphoma?

A cancer of the lymphocytes, with various types including T-cell and B-cell lymphoma.

What is the function of monocytes?

The largest WBCs that become macrophages in tissues, participating in inflammatory responses and cleaning up debris.

What is the difference between oxyhemoglobin and deoxyhemoglobin?

Oxyhemoglobin has oxygen bound to it, while deoxyhemoglobin does not.

What is the significance of hemoconcentration?

It refers to more concentrated blood with less water content, often due to dehydration.

What is the pH balance of blood?

Blood fights to maintain a slightly alkaline pH around 7.4.

What is the role of natural killer (NK) cells?

They identify and kill virus-infected cells, tumor cells, and stressed cells without engulfing them.

What are the types of granulocytes?

Neutrophils, eosinophils, and basophils, each with distinct functions in the immune response.

What is the lifespan of monocytes in circulation?

Monocytes can live for about 100 days in circulation.

What is the primary function of white blood cells?

To provide immunity and respond to inflammation.