circulatory system Flashcards
circulatory system 2
aka cardiovascular system
controls steady circulation of blood through body by means of heart and blood vessels
what does the circulatory system consist of 4
heart
arteries
veins
capillaries
the heart 3
bodys pump
muscular, cone shaped organ that keeps blood moving in system
heartbeat regulated by vagus (10th cranial) and other nerves in autonomic nervous system
what is an average resting rate
72-80 times per minute
two systems ensuring circulation of blood 2
pulmonary circulation
systemic circulation
pulmonary circulation 1
carries blood from the heart to lungs to be oxygenated
systemic circulation
aka general circulation
carries oxygenated blood from heart throughout body and back to heart
blood vessels 2
tube like structures that include arteries, arterioles, capillaries, venues and veins
transports blood to and from heart and to tissues
arteries 3
thick walled muscular flexible tubes
carry OXYGENATED blood AWAY from heart and arterioles
largest artery is aorta
arterioles 1
small arteries that deliver blood to capillaries
capillaries 2
tiny thin walled blood vessels connecting smaller arteries to venules
bring nutrients to cells and carry away waste materials
venules 1
small vessels that connect capillaries to veins
collect blood from capillaries and drain into veins
veins 4
thin-walled blood vessels that are less Elastic than arteries
contain cup-like valves that keep blood flowing in one direction to the heart and prevent back flow
carry blood containing waste product back to heart and lungs for cleaning and to pickup oxygen
located closer to skin surface
blood 3
nutritive fluid circulating through system
considered connective tissue because it connects body systems together
brings oxygen, nutrients and hormones and removing waste products
functions of blood 5
carries water, oxygen, nutrition, and minerals to all cells and tissues
carries away carbon dioxide and waste product to be eliminated through lungs, skin and kidneys
equalizes body temperature- protecting from extreme heat and cold
protects from harmful bacteria and infection - WBC
closes injured tiny blood vessels by clotting preventing blood loss