Plasma it a special fluid secreted from the tissue it is yellowish in nature and mix with the blood stream and helps to carry nitregenous wastes back with the blood stream to the kidney so that the waste may get filtered

**Plasma: The Transporter of Carbon Dioxide and Nitrogenous Wastes**

**Introduction:**

Blood is a vital fluid that circulates throughout our body, delivering essential substances such as oxygen, nutrients, hormones, and removing waste products. It consists of various components, including red blood cells (RBCs), white blood cells (WBCs), platelets, and plasma. Each component plays a crucial role in maintaining the body's overall health and homeostasis.

**Explanation:**

Among the components of blood, plasma serves as the main transporter for carbon dioxide (CO2) and nitrogenous wastes in dissolved form. Here's an explanation of how plasma fulfills this important role:

1. **Plasma Composition:** Plasma is a yellowish fluid that comprises about 55% of total blood volume. It is mostly made up of water, constituting approximately 90-92% of its composition. The remaining 8-10% consists of various solutes, including proteins, nutrients, waste products, hormones, gases, and electrolytes.

2. **Dissolved Gases:** Plasma carries gases such as oxygen (O2) and carbon dioxide (CO2) in dissolved form. When we inhale, oxygen enters our bloodstream and binds to hemoglobin in red blood cells, which are responsible for transporting oxygen to body tissues. On the other hand, carbon dioxide, a waste product produced during cellular respiration, diffuses from body tissues into the bloodstream and is transported in dissolved form by plasma back to the lungs for exhalation.

3. **Nitrogenous Wastes:** Nitrogenous wastes, including urea and ammonia, are produced as byproducts of protein metabolism in the liver. These waste products are toxic to the body and need to be eliminated. Plasma transports these nitrogenous wastes to the kidneys, where they are filtered out and excreted in the form of urine.

4. **Transport Mechanism:** Plasma acts as a medium for transportation due to its liquid nature. The dissolved gases and waste products are carried within the watery plasma, allowing for easy movement throughout the circulatory system.

5. **Other Functions of Plasma:** In addition to transporting gases and wastes, plasma has several other crucial functions. It helps maintain blood pressure, regulates body temperature, aids in immune responses, and plays a role in blood clotting.

**Conclusion:**

Plasma, the fluid component of blood, serves as a vital transporter for carbon dioxide and nitrogenous wastes in dissolved form. Its liquid nature allows for the efficient movement of these waste products throughout the circulatory system. Understanding the role of plasma in transporting gases and waste products is essential for comprehending the functioning of the circulatory system and the overall maintenance of homeostasis in the human body.