Final answer:
The cardiovascular system does indeed protect the body from disease and invasion by pathogens by transporting white blood cells and immune factors throughout the body. It includes the heart, blood vessels, and blood, and uses valves to ensure blood flows correctly to deliver these immune components to where they are needed.
Step-by-step explanation:
The statement 'The cardiovascular system protects the body from disease and invasion from pathogens' is true. The cardiovascular system comprises the heart, blood vessels, and blood. It's a network for transporting nutrients, oxygen, immune factors, and other substances throughout the body, including to our immune system, which helps fight off disease and pathogens. White blood cells, which are part of the immune system, are transported by the blood to sites of infection. Valves within this system prevent the backflow of blood, ensuring that it only moves in one direction towards or away from the heart, which aids in the efficient delivery of immune cells and other defense mechanisms to the areas of the body where they are needed most.
Regarding specific cardiovascular system statements, 'Blood in the pulmonary veins is deoxygenated' is false; pulmonary veins actually carry oxygenated blood back to the heart from the lungs. Red marrow is indeed the source of white blood cells, which are crucial to the body's immune response. The rest of the statements provided align correctly with the cardiovascular system's functions and anatomy. The heart itself, as the pump of this system, plays a critical role in maintaining the circulation of blood and facilitating immune surveillance and response throughout the body.