Quiz 7: The Cardiovascular and Lymphatic Systems

Medicine

The circulatory system is a complex system of blood vessels that travel from the heart to the remaining regions of the body. There are numerous vessel types, and they all have their distinctive properties that merit further discussion. The various types of blood vessels, and their properties and functions, can be compared and contrasted by tabulating them in order to facilitate a clear comparison between them. img

Blood serves as the primary mode of transportation for nutrients and other biomolecules throughout the body. Hence, due to the critical role played by the bloodstream, it is important to understand its basic composition and function. While solutes, cells and tissue are important components of the bloodstream, they do not form the majority of the content of whole blood. Hence, none of these components could be considered the primary constituent of blood. Hence, options b, c and d are incorrect. The vast majority of whole blood content consists of water. Water is the medium through which all other components of whole blood travel. Hence, the correct answer is option img .

A major purpose of blood is to facilitate the exchange of gases between the body and the environment. These gases are then bound with hemoglobin and transported throughout the bloodstream. White blood cells are responsible for activities concerning the immune system, platelets are responsible for activities concerning blood clotting, and macrophages are not functional within the bloodstream. None of these cell types contain hemoglobin. Hence, options b, c and d are incorrect. Red blood cells contain the hemoglobin required to bind the gases and transport them throughout the bloodstream. Hence, they are responsible for facilitating the exchange of gases. Hence, the correct answer is option img .