Foundations 2: KSA 2

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113 Terms

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Cardiovascular system
consists of the heart and blood vessels; transportation network of the body that carries nutrients, oxygen, and waste products to and from cells
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Heart
muscular organ in the chest; has four chambers
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Blood vessels
tube-like structures that carry the blood being pumped by the heart
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Arteries
blood vessels that carry oxygen-rich blood away from the heart
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Veins
blood vessels that carry carbon dioxide-rich blood to the heart from the body tissues
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Hormones
allow for communication between organs and organ systems; signaling molecules
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Blood
helps regulate body temperature
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Pulmonary circulation
allows for carbon dioxide-rich blood to go from the tissues to the heart to the lungs; blood enters right atrium, right ventricle, left/right pulmonary arteries, left/right lung where it becomes oxygenated, left/right pulmonary veins, left ventricle
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Right/left pulmonary arteries
only artery to carry de-oxygenated blood; brings blood from heart to lungs; emerge from pulmonary trunk of heart
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Right/left pulmonary veins
only vein to carry oxygenated blood; brings blood from lungs to heart; enter into left atrium
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Systemic circulation
allows for oxygenated blood from heart to go to the tissues; blood goes from left ventricle to aorta, arteries, arterioles, capillaries, capillary beds where blood slows so gases and nutrients can then diffuse into tissues, deoxygeated blood now travels through venules, veins, superior/inferior vena cava and back to right atrium
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Aorta
largest artery
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Inferior and superior vena cava
largest veins
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Capillary beds
slow blood flow so exchange of gases and nutrients between blood and tissues can occur
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Anastomoses
blood vessels connecting to each other
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Arteriovenous anastomosis
artery and vein join; occur in some regions to retain body heat
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Arterioarteral anastomosis
artery and artery join
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Venovenous anastomosis
vein and vein join
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Collateral circulation
artery and veins joining in arteriovenous anastomosis provides possible detour when there is a blockage in blood supply
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Functional terminal arteries
artery and veins joining in arteriovenous anastomosis to avoid blockage but it’s ineffective or insufficient
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True terminal arteries
blood vessels that do not form anastomoses at all
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Portal venous system
venous system connecting two capillary beds before blood reaches heart
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Hepatic portal venous system
directs nutrient rich blood from capillary beds of digestive tract to the capillary beds of the liver
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thoracic outlet syndrome
condition when any of the neurovascular structures are compressed
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root of the neck
junctional area between neck and thorax; formed laterally by first pair of ribs, anteriorly manubrium of sternum, posteriorly body of T1 vertebra
junctional area between neck and thorax; formed laterally by first pair of ribs, anteriorly manubrium of sternum, posteriorly body of T1 vertebra
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Brachiocephalic trunk artery
passes through the root of the neck
passes through the root of the neck
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Subclavian artery
passes through the root of the neck; has three branches
passes through the root of the neck; has three branches
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Vertebral artery
part of first branch of subclavian artery
part of first branch of subclavian artery
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Internal thoracic artery
part of first branch of subclavian artery
part of first branch of subclavian artery
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Thyrocervical trunk
part of first branch of subclavian artery
part of first branch of subclavian artery
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First branch of subclavian artery
Vertebral artery, Internal thoracic artery, Thyrocervical trunk
Vertebral artery, Internal thoracic artery, Thyrocervical trunk
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Second part of subclavian artery
costocervical trunk
costocervical trunk
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Third part of subclavian artery
dorsal scapular artery
dorsal scapular artery
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External and anterior jugular vein
veins in the root of the neck; drain into subclavian vein
veins in the root of the neck; drain into subclavian vein
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Subclavian vein
external and anterior jugular vein
external and anterior jugular vein
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Brachiocephalic vein
subclavian vein and interior jugular vein combine; where lymphatic drainage occurs
subclavian vein and interior jugular vein combine; where lymphatic drainage occurs
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Vagus nerve
major nerve in root of the neck
major nerve in root of the neck
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Sympathetic trunks
superior, middle, and inferior cervial ganglion; distribute synthetic innervation to cranium, neck, thorax, and upper lip
superior, middle, and inferior cervial ganglion; distribute synthetic innervation to cranium, neck, thorax, and upper lip
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Phrenic nerves
supply the diaphragm
supply the diaphragm
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Mediastinum
middle area of the thoracic cavity; between two pulmonary cavities; does not contain lungs
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Superior mediastinum
structures of thoracic cavity that are continuous with the root of the neck; contains the thymus, great vessels, inferior continuation of the trachea, inferior continuation of the esophagus, thoracic duct, lymphatic trunks
structures of thoracic cavity that are continuous with the root of the neck; contains the thymus, great vessels, inferior continuation of the trachea, inferior continuation of the esophagus, thoracic duct, lymphatic trunks
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Mediastinal pleura
covers either side of the mediastinum
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Transverse thoracic plane
separates the superior mediastinum from inferior mediastinum; anatomically it is where the burification/branching of the trachea is and it is the beginning and end of the arch of the aorta
separates the superior mediastinum from inferior mediastinum; anatomically it is where the burification/branching of the trachea is and it is the beginning and end of the arch of the aorta
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Inferior mediastinum
lies between transverse thoracic plane and diaphragm
lies between transverse thoracic plane and diaphragm
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Middle part of inferior mediastinum
contains the pericardium, heart and root of its great vessels
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Thymus
inferior part of neck, anterior part of superior mediastinum; primary lymphoid organ plays a role in immune cell develop; after puberty, it undergoes involution and becomes fat
inferior part of neck, anterior part of superior mediastinum; primary lymphoid organ plays a role in immune cell develop; after puberty, it undergoes involution and becomes fat
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Great vessels
brachiocephalic veins, superior vena cava, arch of the aorta, brachiocephalic trunk, left carotid artery, left subclavian artery
brachiocephalic veins, superior vena cava, arch of the aorta, brachiocephalic trunk, left carotid artery, left subclavian artery
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Ligamental arteriosum
fibrous band; remnant of embryological ductus arteriosus which shunts blood to travel from pulmonary trunk to aortic arch to bypass fetal lungs
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Right vagus nerve
inferior to superior mediastinum, right side of trachea, gives rise to nerves that contribute to the cardiac plexus
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Left vagus nerve
descends neck posteriorly to the lft common carotid artery, enters mediastinum between common carotid artery and subclavian artery; gives rise to laryngeal nerve
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Phrenic nerve
innervates the diaphragm with motor and sensory fibers; reaches superior mediastinum between subclavian artery and brachiocephalic vein; passes anterior to the root of the lungs
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Trachea
descends anterior to the esophagus and enters superior mediastinum; positioned a bit to the right; divides into right and left main bronchi
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Esophagus
fibromuscular tube from pharynx to stomach; flattened from front to back
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Posterior part of inferior mediastinum
posterior to the pericardium and diaphragm, inferior to transverse thoracic plane, between parietal pleura of lungs
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Anterior part of inferior mediastinum
between sternum and transversus thoracis muscles anteriorly and pericardium posteriorly; loose connective tissue, fat, lymphatic vessels a few lymph nodes, branches of internal thoracic vessels
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Coronary vascular pairs
right coronary atrium - small cardiac vein

posterior descending artery - middle cardiac vein

left coronary artery (no venous pair)

left anterior descending artery - great cardiac vein

circumflex artery - great cardiac vein
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circumflex artery
great cardiac vein
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right coronary atrium
small cardiac vein
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posterior descending artery
posterior middle cardiac vein
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left coronary artery
no venous pair
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left anterior descending artery
great cardiac vein
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Blood flow through the chambers is
in series and in parallel
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Electrically resistant cardiac skeleton
allows for normal cardiac conductance
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Cardiac conductance detected usnig
ECG
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Right ventricle
anterior border of heart
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Left and right atrium
superior border of heart
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auricles
increase capacity of the heart when needed
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Superior vena cava
connected to right atrium; brings deoxygenated blood into top of right atrium
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Inferior vena cava
connected to right atrium; brings deoxygenated blood into top of right atrium
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Pulmonary trunk
blood is pumped here from right ventricle to go to lungs
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4 pulmonary veins drain _____ blood into left atrium
oxygenated blood
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Oxygenated blood travels from left ventricle to
aorta
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Coronary sulcus
separates the right atrium and ventricle; separates auricle of left atrium and left ventricle
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Coronary sulcus aka
Atrioventricular (AV) groove
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Anterior interventricular sulcus
separates right and left ventricles on front part of heart
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Ascending aorta
emerges from right ventricle and then arches toward back for form aortic arch
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Apex
tip of the heart; points anteriorly and slightly to the left
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Most anterior part of the heart
Right ventricle
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Ligamentum arteriosum
connects superior portion of pulmonary artery to the inferior surface or aortic arch; significant in embryonic develpment
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Most posterior part of the heart
left atrium (anterior to esophagus)
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Tricuspid valve
separates the right atrium and right ventricle; attaches to papillary muscles via chordae tendineae
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Mitral valve
separates the left atrium and left ventricle; attaches to papillary muscles via chordae tendineaeaoritc
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Aortic semilunar valve
pumps blood from left ventricle to aorta to reach the rest of the body
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Posterior interventricular sulcus
separates the right and left ventricle on the backside of the heart
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Interatrial septum
separates the right and left atrium
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Interventricular septum
separates the right and left ventricles
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Chordae tendineae
attach tricuspid valve and mitral valve to papillary muscles
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Pulmonary semilunar valve
pumps blood from right ventricle to pulmonary trunk/pulmonary arteries to reach the rest of the body
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SA node
located at junction of superior vena cava and right atrium
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Conducting system of heart
SA node and AV node
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AV node
located in interatrial septum
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Anterior view of heart
coronary sulcus, anterior interventricular sulcus, superior vena cava, inferior vena cava, ascending aorta, pulmonary trunk, ligamentum arteriosum
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Posterior view of the heart
posterior intervenrticular sulcus, left and right pulmonary veins, left and right pulmonary arteries, aortic arch, superior vena cava, inferior vena cava
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Heart is innervated by
sympathetic and parasympathetic nerve fibers of the cardiac plexus; anterior surface near bifurcation (branching of trachea)
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Venous blood is drained by
middle cardiac vein, left marginal vein, left posterior ventricular vein, part of small cardiac vein, oblique vein of left atrium
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Dominance of coronary artery
whether the right or left coronary artery gives off the posterior interventricular branch; 65-85% are right coronary artery dominant
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Most common dominance
right coronary artery dominance; 65-75% of people
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Heart receives arterial blood supply from
right and left coronary artery
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Venous blood is drained by the
middle cardiac vein, left marginal vein, left posterior ventricular vein, part of the small cardiac vein, oblique vein of left atrium
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Atrioventricular (AV) node
depolarization wave travels from pacemaker cells in SA node to ventricles where it is slowed because of small diameter of AV node and slow calcium ion channels