: These cells contain hemoglobin, an iron-rich protein that binds to oxygen to transport it from the lungs to the rest of the body.
: These are the primary actors in the immune system, defending the body against infections and foreign pathogens. : These cells contain hemoglobin, an iron-rich protein
Blood is a vital fluid that serves as the body’s primary transport system, delivering essential nutrients and oxygen to cells while removing waste products. It makes up approximately 8% of an adult's total body weight. Composition of Blood It makes up approximately 8% of an adult's total body weight
: Small cell fragments that help the blood clot at the site of an injury to stop bleeding. Blood Types and Groups How to Make Blood - Let's Go Live It carries salts, proteins, and the various blood
Blood is composed of four main components, each with distinct roles:
: A yellowish liquid that is about 90% water. It carries salts, proteins, and the various blood cells throughout the circulatory system.