5 During which period of Earth s history did four-legged animals appear on land?

Plasma contains antibodies.

Explanation:

Plasma is the straw colour liquid portion of the blood that is devoid of red blood cells, white blood cells, platelets and other components. It is made up of water, salts, antibodies, enzymes, glucose, minerals, ions, proteins, clotting factors, and carbon dioxide.

In cases of severe blood loss in patients, plasma is given to restore coagulation and retain immunity.