Blood -

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

: These are the primary actors in the immune system, defending the body against infections and foreign pathogens. Blood is a vital fluid that serves as

: These cells contain hemoglobin, an iron-rich protein that binds to oxygen to transport it from the lungs to the rest of the body. Blood is a vital fluid that serves as

: A yellowish liquid that is about 90% water. It carries salts, proteins, and the various blood cells throughout the circulatory system. Blood is a vital fluid that serves as