Study "HAP CARDIO +INTERG SYSTEM MEDIUM", a flashcard deck on FORKSAI.
Which of the following correctly defines the circulatory system?
A. The circulatory system is the cardiovascular system combined with the lymphatic system, primarily functioning to transport oxygen, nutrients, hormones, and remove waste products.
What is the primary function of the cardiovascular system?
C. To move blood throughout the body via the heart and blood vessels, transporting oxygen, nutrients, hormones, and removing waste products.
Which component of blood is primarily responsible for oxygen transport?
A. Red blood cells are specialized for oxygen transport due to their hemoglobin content.
A patient presents with a condition where their arterioles are narrowing, leading to fewer deliveries of blood to their tissues. This process is known as:
B. Vasoconstriction. This is the narrowing of arterioles, which reduces blood flow to tissues.
Which type of blood vessel is characterized by a one-cell thick wall, is very narrow, and is the primary site for the exchange of O2/nutrients out and CO2/waste in?
C. Capillaries. Their thin walls and narrow diameter facilitate efficient exchange between blood and tissues.
At the arteriole end of a capillary bed, what process occurs due to high pressure?
A. Filtration. High pressure at the arteriole end pushes fluid, oxygen, glucose, and ions out into the tissues.
Which of the following organ systems is responsible for producing blood cells, an essential component transported by the cardiovascular system?
B. Skeletal system. Bone marrow within the skeletal system is responsible for hematopoiesis, the production of blood cells.
The heart is located in the mediastinum. Where exactly is this area?
A. Central thoracic cavity, behind/left of the sternum, between the lungs. This describes the precise anatomical location of the heart.
Which layer of the heart wall is primarily composed of cardiac muscle and is responsible for the heart's pumping action?
B. Myocardium. This is the thick, muscular middle layer of the heart wall responsible for contraction.
The superior vena cava returns deoxygenated blood from the upper body to which chamber of the heart?
A. Right atrium. The superior vena cava is one of the major vessels that delivers deoxygenated blood to the right side of the heart.