Blood
Composition of blood including plasma and formed elements (erythrocytes, leukocytes, platelets) and their functions.
What is Blood?
The liquid component of blood, in which the blood cells are suspended.
Key points
- Describe the composition of blood.
- Differentiate between plasma and formed elements.
- List the types of formed elements and their primary functions.
- Explain the role of key components like hemoglobin and fibrinogen.
Common exam trap
Confusing the percentage composition of plasma and formed elements.
Definitions
- Term
Plasma
- Meaning
The liquid component of blood, in which the blood cells are suspended.
- Term
Erythrocytes
- Meaning
Red blood cells, responsible for transporting oxygen.
- Term
Leukocytes
- Meaning
White blood cells, part of the immune system.
- Term
Thrombocytes
- Meaning
Platelets, involved in blood clotting.
- Term
Hemoglobin
- Meaning
The protein in red blood cells that carries oxygen.
- Term
Fibrinogen
- Meaning
A protein in plasma that is converted to fibrin during blood clotting.
Learning objectives
Describe the composition of blood.
Differentiate between plasma and formed elements.
List the types of formed elements and their primary functions.
Explain the role of key components like hemoglobin and fibrinogen.
Prerequisites
Basic understanding of cell structure and function.
Knowledge of basic biological molecules (proteins, carbohydrates, lipids).
Common mistakes
Confusing the percentage composition of plasma and formed elements.
Not remembering the specific functions of different types of leukocytes.
Forgetting the role of fibrinogen in clotting.
Overlooking the inorganic salts and other dissolved substances in plasma.
Keywords
Blood
Plasma
Erythrocytes
Leukocytes
Platelets
Hemoglobin
Fibrinogen
Connective Tissue
Homeostasis
Oxygen Transport
Immunity
Blood Clotting
Practice preview
Which plasma protein is primarily responsible for maintaining the osmotic balance of the blood?…
medium
What percentage of total blood volume is typically composed of plasma?…
easy
What is the primary function of erythrocytes in the blood?…
easy