Blood is a vital fluid that circulates throughout the body, delivering oxygen and nutrients to cells and removing waste products. It is made up of two main components: plasma and blood cells.
- Plasma, which is a straw-colored fluid, accounts for about 55% of blood volume. It is mainly composed of water, but also contains important proteins, electrolytes, and nutrients.
- Blood cells are suspended in the plasma and make up the remaining 45% of blood. These cells include:
- Red blood cells (RBCs): These cells are responsible for carrying oxygen from the lungs to the body's tissues.
- White blood cells (WBCs): These cells are part of the immune system and help defend the body against infection.
- Platelets: These small cell fragments help with blood clotting and wound healing.
In summary, blood is a complex fluid consisting of plasma and various types of blood cells, each playing a crucial role in maintaining the health and function of the body.
