1. Transport oxygen to tissue
2. Transport carbon dioxide away from
tissue
1. Fight infection via neutrophils
2. Fight infection via immune system:
(lymphocytes, monocytes,
basophils, and eosinophils)
3. Fight parasitic infection via
eosinophils
1. Plug leaks in the vascular system
2. Initiates clotting mechanism
3. Nourishes the endothelial cells