Understanding the 4 Key Components of Blood

The four elements of blood are:

1. Red Blood Cells (Erythrocytes):

- Make up about 45% of blood volume.

- Contain the oxygen-carrying protein haemoglobin, giving blood its red colour.

- Transport oxygen from the lungs to body tissues and organs.

- Remove waste product carbon dioxide.

2. White Blood Cells (Leukocytes):

- Comprise less than 1% of blood volume.

- Defend the body against infections and disease with specialized immune cell functions like phagocytosis, antigen recognition, and antibody production.

- Main types include neutrophils, lymphocytes (B cells, T cells, and Natural Killer cells), monocytes, eosinophils, and basophils.

3. Platelets (Thrombocytes):

- Contribute about 0.1% to blood volume.

- Play a crucial role in blood clotting (hemostasis) and preventing excessive bleeding.

-Form a temporary plug at injury sites, activate clotting factors, and promote the formation of a stable blood clot.

4. Plasma:

- Constitutes about 55% of blood volume.

- Contains water, various dissolved ions like sodium and chloride, proteins (such as albumin and fibrinogen), hormones, nutrients, waste products, and gases.

- Maintains blood pH, transports nutrients and regulatory factors, and contributes to fluid balance.