what is the 4 part of the blood

http://anthro.palomar.edu/blood/blood_components.htm

The four main components of blood are red blood cells, white blood cells, platelets, and plasma.

1. Red Blood Cells (RBCs): These are the most abundant cells in the blood and contain a protein called hemoglobin that carries oxygen from the lungs to the rest of the body.

2. White Blood Cells (WBCs): These cells are part of the immune system and help fight off infections and diseases. There are different types of white blood cells that have specific functions in the body's defense against pathogens.

3. Platelets: These are small cell fragments that help in blood clotting. When you have a cut or injury, platelets cluster together at the site to form a clot, which stops bleeding.

4. Plasma: This is the liquid portion of blood and makes up about 55% of total blood volume. It is a yellowish fluid that contains water, proteins, hormones, waste products, and nutrients. Plasma helps transport these substances throughout the body.

To find this information, you can use reliable sources such as medical textbooks, reputable medical websites, or consult a healthcare professional who specializes in hematology or blood-related matters.