Part 1 Flashcards
What is the main function of systemic circulation?
Deliver adequate oxygen & nutrients to tissues and remove CO2 & waste products from tissues
What endocrine function does systemic circulation have?
Serves as a conduit for transport of hormones allowing them to act at as distant site from their location of production
What functional part of the circulatory system is designed to carry blood under high pressure out to the tissue beds?
Systemic arteries
What functional part of the circulatory system acts as a system of control valves to regulate local flow?
Arterioles and pre-capillary sphincters
What functional part of the circulatory system is responsible for the exchange between tissue cells and blood?
Capillaries (one cell layer thick)
What functional part of the circulatory system collects blood from capillaries?
Venules
What functional part of the circulatory system returns blood to the heart and functions in dynamic storage?
Systemic veins
What is blood flow ultimately dependent upon and directly proportional to?
Metabolic demand
What determines local tissue flow?
Overall venous return
What controls cardiac output?
Local tissue flow
What keeps arterial pressure relatively constant even when there are drastic changes in local flow or cardiac output?
Nervous system
What type of circulatory pressure if independent of local flow or cardiac output?
Arterial pressure
What effect can the nervous system exert on vessels to increase pressure?
Tense them up
What effect can the nervous system exert on vessels to decrease pressure?
Loosen them up
What organ is in change of blood volume?
Kidneys
