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Questions and Answers
What are the three main constituents of blood that can be separated by centrifugation?
What are the three main constituents of blood that can be separated by centrifugation?
Plasma, buffy coat, and erythrocytes.
How do red blood cells (RBCs) contribute to oxygen transport in the body?
How do red blood cells (RBCs) contribute to oxygen transport in the body?
RBCs carry oxygen from the lungs to tissues and return carbon dioxide to the lungs.
Describe the role of leukocytes in the immune system.
Describe the role of leukocytes in the immune system.
Leukocytes defend the body against pathogens and contribute to the immune response.
What is the primary function of platelets in the blood?
What is the primary function of platelets in the blood?
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Why are RBCs considered biconcave and what advantage does this shape provide?
Why are RBCs considered biconcave and what advantage does this shape provide?
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Study Notes
Blood Composition
- Blood is a fluid connective tissue comprising plasma, blood cells, and platelets.
- Makes up approximately 8% of body weight, with an average adult having about 5-6 liters of blood.
- Blood is separated into three main constituents when spun in a centrifuge: plasma, buffy coat, and erythrocytes.
Red Blood Cells (RBCs)
- Known as erythrocytes, RBCs are biconcave cells that lack a nucleus in humans.
- Contain hemoglobin, an iron-rich protein that imparts red color and facilitates oxygen transport.
- Most abundant blood cells, produced in bone marrow, primarily responsible for carrying oxygen to tissues and organs.
White Blood Cells (WBCs)
- Also referred to as leucocytes, these are colorless blood cells devoid of hemoglobin.
- Classified into granulocytes and agranulocytes, serving distinct roles in the immune system.
- Key function includes contributing to immunity and defense against pathogens like bacteria and viruses.
Pathogens and Antibodies
- Pathogens are harmful bacteria or viruses that invade the body and can cause illness.
- Certain types of leukocytes produce antibodies, which are chemicals designed to neutralize or destroy pathogens.
Platelets (Thrombocytes)
- Specialized blood cells formed in the bone marrow involved in the clotting process.
- Key player in coagulation, platelets activate upon bleeding, helping to form clots and stop further blood loss.
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Description
Test your knowledge about the composition and functions of blood in the human body. This quiz covers blood components such as plasma, blood cells, and platelets, as well as their roles. Understand how blood circulates and contributes to our overall health.
