What is plasma primarily composed of?

Plasma is the liquid component of blood that makes up about 55% of its overall volume. It is primarily composed of water, but it also contains a variety of dissolved substances, including electrolytes, nutrients, gases (such as oxygen and carbon dioxide), hormones, waste products, and proteins. The presence of electrolytes is crucial for maintaining fluid balance, nerve function, and muscle function. Nutrients provide energy and building blocks for cells, while waste products are transported to organs for excretion. This significant role that plasma plays in transporting these essential components throughout the body highlights its importance in maintaining homeostasis.