Heart Word Scramble
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Question | Answer |
volume of blood pumped per day | 14,000 L |
rate of blood circulation at rest | 5 L / dat |
What are the layers of the heart? | 1) Fibrous layer 2)Outer parietal pericardium (serous) 3) Inner visceral pericardium (serous) |
Space between 2 serous layers? | Pericardial cavity |
Fluid build-up in heart cavity? | Cardiac tamponade |
Outermost layer of heart wall | Epicardium (visceral pericardium) |
Cardiac muscle tissue | Myocardium |
Innermost cardiac layer | Endocardium |
Features of Endocardium | 1) Smooth lining of chambers 2) covers valves of heart 3) continuous with endothelial lining of large blood vessels |
Vessels through Right Atrium | 1) Superior Vena Cava 2) Inferior Vena Cava 3) Coronary Sinus |
Valves of right ventricle? | 3cuspid valve and pulmonary semilunar valve |
Valves of left ventricle? | 2cuspid/mitral valves and aortic semilunar valve |
Origin of coronary artery | base of ascending aorta |
left coronary artery | 1) supplies both ventricles 2) supplies left atrium |
Right coronary artery | supplies both ventricles |
posterior coronary veins | 1)small cardiac vein 2) coronary sinus 3) middle cardiac vein |
anterior coronary veins | 1) anterior cardiac vein 2) great cardiac vein |
Phase of contraction | Systole |
Phase of relaxation | Diastole |
S1 | "Lubb" = closing of AV valves, beginning of ventricular systole |
S2 | "Dupp" = closing of semilunar valves, end of ventricular systole |
S3 | Ventricular filling |
S4 | Atrial systole |
Inhibit speed of contraction | ANS, vagus nerve |
pattern of conduction of the heart | SA node - AV node - His - Purkinje fibers |
location of SA node | Right atrium, inferior to superior vena cava |
location of AV node | Atrioventricular septum |
location of bundle of His | interventricular septum |
SA versus AV conduction | SA = same-time contraction between atria while AV = delay between atria and ventricles |
responsible for contraction of ventricular myocardium | Purkinje fibers |
circulation of deoxygenated blood | right ventricle - pulmonary trunk - right/left pulmonary arteries - capillaries around alveoli |
When does heart develop | 3rd week of gestation |
original tissue of heart | mesoderm |
Development of endothelial tubes | truncus arteriosus - bulbus cordis - ventricle - atrium - sinus venosus |
first heartbeat | day 22 |
changes in pregnancy | 30%+ stroke volume, cardiac output 30%+, HR + 15%, blood volume +50% |
becomes the Ligamentum Venosum | Ductus Venosus |
becomes the Ligamentum Arteriosum | Ductus Arteriosus |
becomes the medical umbilical ligament | Umbilical Arteries |
becomes Ligamentum Teres | Umbilical Vein |
structures necessary to fetal circulation | placenta, ductus arteriosus, foramen ovale |
Innervation to SA node | parasympathetic |
slowing of the heatbeat | bradycardia |
acceleration of the heartbeat | tachycardia |
extends the circumference of the heart, separates atria and ventricles | coronary sulcus |
left coronary artery branches into: | anterior a. and circumflex a. |
Created by:
Schnee
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