Cardiovascular System Ch. 13 Flashcards
pericardium
loose-fitting sac around the heart
pathway of blood through heart from vena cava to the lungs
right atrium - tricuspid valve - right ventricle - pulmonary valve
skeleton of the heart includes these
fibrous connective tissue that surrounds the valves and in the interventricular septum
heart valves that close when the ventricles contract
bicuspid and tricuspid valves
Sequence of cardiac impulses
SA node - AV node - AV bundle - Purkinje fibers
heart structure with self-exciting tissue
SA node
branches of the aorta
aortic sinus - brachiocephalic artery - common carotid artery - subclavian artery - thoracic aorta - abdominal aorta - celiac artery - superior, inferior, and mesenteric arteries - suprarenal arteries - renal arteries - gonadal arteries - common iliac arteries
*The Pulmonary artery is not a branch of the aorta.
nerve fibers cause the heart rate to decrease
parasympathetic
blood vessel serves as blood reservoir
veins
vein that drains blood from face and scalp
external jugular vein
Starling’s law
the greater the length of the myocardial fibers the greater the force as they contract
When is blood pressure greatest in the systemic arteries?
ventricular systole
P wave of EKG
depolarization of atria
why do plasma proteins remain in blood capillaries
maintain osmotic pressure of the blood
Artrial natriuretic factor
inhibits renin, angiotensin, and aldosterone and is released by heart in its atrium
Angina pectoris
pain caused by obstruction or narrowing of an artery on outside of heart
T wave on EKG
repolarization of ventricles
nerve fibers cause the heart rate to increase
sympathetic
what vessel of the heart has relatively low oxygen content
pulmonary artery
bradycardia
slow heart rate
atherosclerosis
fatty materials on artery walls - increased by fatty diet, high blood pressure
*Use diet of Unsaturated fats to combat it