Blood is a complex and vital fluid that circulates throughout the body, delivering oxygen and nutrients to cells while removing waste products. It is made up of several components that work together to perform essential functions.



Plasma is the liquid component of blood, making up approximately 55% of its total volume. It is a clear, yellowish fluid that contains various substances, including:

- Water: makes up approximately 90% of plasma
- Proteins: including albumin, globulins, and fibrinogen
- Electrolytes: such as sodium, potassium, and calcium
- Hormones: including insulin and cortisol
- Waste products: such as urea and creatinine



Red blood cells, also known as erythrocytes, are the most abundant cells in the blood, making up approximately 45% of its total volume. They are responsible for carrying oxygen from the lungs to the body's tissues and removing carbon dioxide from the cells. Red blood cells contain a protein called hemoglobin, which binds to oxygen and gives them their characteristic red color.



White blood cells, also known as leukocytes, are responsible for defending the body against infection and disease. They make up only a small fraction of the total blood volume, approximately 1%. There are several different types of white blood cells, including:

- Neutrophils: the most common type, responsible for fighting bacterial infections
- Lymphocytes: responsible for fighting viral infections and producing antibodies
- Monocytes: responsible for engulfing and digesting foreign substances
- Eosinophils: responsible for fighting parasites and allergic reactions
- Basophils: responsible for releasing histamine during allergic reactions



Platelets, also known as thrombocytes, are small cell fragments that are responsible for blood clotting. They make up approximately 4% of the total blood volume and are essential for preventing excessive bleeding from injuries or damaged blood vessels.



In conclusion, blood is a complex fluid that is composed of plasma, red blood cells, white blood cells, and platelets. Each component plays a critical role in maintaining the body's health and functioning. Understanding the composition of blood is essential for diagnosing and treating various medical conditions and diseases.

blood is composition of erythrocytes..leucocytes...thrombocytes and plasma....blood consists about 8%in body....it can b of three types