The cellular components of blood<span> include red corpuscles (erythrocytes), platelets (thrombocytes), and five types of white corpuscles (leukocytes). Erythrocytes and thrombocytes are anucleated </span>cells<span> which perform most of their functions within the</span>blood<span>.</span>
Humans get there energy primarily from glucose I believe. We break down glucose to get ATP (Adenosine Triphosphate) which is then used to supply energy to our cells in order to function.