What components of blood can be examined?

White blood cell count (WBC) Red blood cell count (RBC) Platelet count. Hematocrit red blood cell volume (Hct)

What are the components of blood and why are they important?

Plasma is the main component of blood and consists mostly of water, with proteins, ions, nutrients, and wastes mixed in. Red blood cells are responsible for carrying oxygen and carbon dioxide. Platelets are responsible for blood clotting. White blood cells are part of the immune system and function in immune response.

What components in the blood can be viewed on a smear?

The results of a blood smear typically include a description of the appearance of the red blood cells, white blood cells, and platelets as well as any abnormalities that may be seen on the slide.

How do you examine blood?

Blood usually is drawn from a vein in your arm or other part of your body using a needle. It also can be drawn using a finger prick. The person who draws your blood might tie a band around the upper part of your arm or ask you to make a fist.

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What are the 4 components of Blood and their percentages?

Blood components

  • Plasma. Plasma constitutes 55% of total blood volume. …
  • White Blood Cells. There are between 6,000 and 8,000 white cells per cubic millimetre of blood. …
  • Platelets. Platelets, or thrombocytes, are smaller than the red and white blood cells. …
  • Red Blood Cells.

What are the 7 formed elements of blood?

Formed Elements

  • Erythrocytes (red blood cells) Erythrocytes, or red blood cells, are the most numerous of the formed elements. …
  • Leukocytes (white blood cells) Leukocytes, or white blood cells, are generally larger than erythrocytes, but they are fewer in number. …
  • Thrombocytes (platelets)

What are the 7 components of blood?

Overview of Blood and Blood Components

  • Nourishment.
  • Electrolytes.
  • Hormones.
  • Vitamins.
  • Antibodies.
  • Heat.
  • Oxygen.
  • Immune cells (cells that fight infection)

What does a blood film test show?

A blood film examination allows the evaluation of white blood cells (WBCs, leucocytes), red blood cells (RBCs, erythrocytes), and platelets (thrombocytes). These cell populations are produced and mature in the bone marrow and are eventually released into the bloodstream as needed.

Which type of WBC is largest in size?

Monocytes. Monocytes are the largest cells of the blood (averaging 15–18 μm in diameter), and they make up about 7 percent of the leukocytes.

What diseases require a peripheral blood smear and why?

A blood smear can be used to help diagnose or check on many conditions, such as: Anemia. Jaundice. Sickle cell disease.

What is the best test in determining the presence of blood?

Complete Blood Count

This test, also known as a CBC, is the most common blood test performed. It measures the types and numbers of cells in the blood, including red and white blood cells and platelets. This test is used to determine general health status, screen for disorders and evaluate nutritional status.

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What are the stages of processing a blood sample?

Several essential steps are required for every successful collection procedure:

  • Venipuncture Procedure: …
  • Fingerstick Procedure: …
  • Heelstick Procedure (infants): …
  • Order of Draw: …
  • Labeling The Sample. …
  • Areas to Avoid When Choosing a Site for Blood Draw: …
  • Techniques to Prevent Hemolysis (which can interfere with many tests):

What are the five properties of blood?

Blood also may be analyzed on the basis of properties such as total volume, circulation time, viscosity, clotting time and clotting abnormalities, acidity (pH), levels of oxygen and carbon dioxide, and the clearance rate of various substances (see kidney function test).

What are the 8 functions of blood?

Functions of the Blood: 8 Facts about Blood

  • Blood Is Fluid Connective Tissue. …
  • Blood Provides the Body’s Cells with Oxygen and Removes Carbon Dioxide. …
  • Blood Transports Nutrients and Hormones. …
  • Blood Regulates Body Temperature. …
  • Platelets Clot Blood at Sites of Injury. …
  • Blood Brings Waste Products to the Kidneys and Liver.

What are the two major components of blood?

Blood is classified as a connective tissue and consists of two main components:

  • Plasma, which is a clear extracellular fluid.
  • Formed elements, which are made up of the blood cells and platelets.


What percentage of blood is hemoglobin?

Red Blood Cells – (erythrocytes)

Red blood cells are disc-shaped cells containing hemoglobin, which enables the cells to pick up and deliver oxygen to all parts of the body, then pick up carbon dioxide and remove it from tissues. Make up about 40 percent of your blood.

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Cardiac cycle