Final answer:
The statement about the circulatory system and cardiovascular system is false; the circulatory system, which includes the cardiovascular system, carries blood to all parts of the body, not just the lungs. The spleen's role in blood filtration is complex, involving multiple types of tissue and serving as part of the cardiovascular system.
Step-by-step explanation:
False. The statement that the circulatory system brings blood to and from the body, while the cardiovascular system brings blood to and from the lungs only is incorrect. The circulatory system encompasses the entire network of blood vessels that transport blood throughout the body, which includes the cardiovascular system. The cardiovascular system is a part of the circulatory system and includes the heart and blood vessels, which carry blood not only to and from the lungs (pulmonary circulation) but also to all body tissues (systemic circulation).
In terms of the spleen and its role in circulation, blood transported to and from the spleen is not an example of a simple blood flow pathway. The spleen's function is to filter blood of damaged cells and pathogens and is part of a complex network that involves the cardiovascular system. It receives oxygenated blood through arteries and returns deoxygenated blood to the venous system.
The spleen consists of red pulp and white pulp. The red pulp helps filter out damaged red blood cells, while the white pulp contains lymphocytes to target and remove antigen-coated bacteria.
It is also inaccurate to say that an open circulatory system involves contained blood vessels; this is a feature of a closed circulatory system, where blood circulates unidirectionally from the heart, throughout the systemic circulatory route, and then back to the heart. By contrast, in an open circulatory system, the fluid (hemolymph) is not confined to vessels and bathes organs directly.