STRUCTURES OF CARDIOVASCULAR SYSTEM ? The system is composed of the heart. Blood, and blood vessel ? Movement of blood and Lymph ? In the lungs oxygen enter the blood whereas CO2 diffuses out. ? Blood moves through arteries and veins. ? Capillaries carry bloods to surrounding tissue ? Leaked fluid is picked up by the lymphatic vessels Bacterial Cardiovascular and Systemic Disease. Septicemia- any microbial infection that produces illness. Bacteremia- bacterial septicemia. Toxemia- release of bacterial toxins inti the blood.