Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
HW: Ch 8A.1 (222-228
complete the terms
| Question | Answer |
|---|---|
| leaflets | flat, leaf shaped structures that comprise the valves of the heart and prevent the backflow of blood |
| lumen | tubular space or channel within an organ or structure of the body space within an artery, vein, intestine or tube |
| regurgitation | backflow or ejecting of contents through an opening |
| sphincters | circular muscles found in a tubular structure or hollow organ |
| vasoconstriction | narrowing of the lumen of a blood vessel that limits blood flow |
| vasodilation | widening of the lumen of a blood vessel that limits blood flow |
| viscosity | thickness or a measure of how resistant a liquid is to flowing |
| tunica externa | outer coat, composed of connective tissue that provides strength and flexibility |
| tunica media | middle layer, composed of smooth muscle |
| pulse | blood pumped from the heart |
| tunica intima | thin, inner lining of the lumen of the vessel, composed of endothelial cells that provide a smooth surface on the inside of the vessel. |
| capillaries | microscopic vessels that join the arterial system with the venous system |
| valves | small structures within veins that pevent the backflow of blood |
| heart | muscular pump that propels blood to the entire body |
| pericardium | composed of three distinct layers |
| endocardium | serous membrane that lines the four chambers of the heart and its valves |
| myocardium | muscular layer of heart |
| epicardium | outermost layer of the heart |
| left and right artium | collects blood |
| right and left ventricle | pump blood from the heart |
| right ventricle | pumps blood to the lungs called pulmonary circulation |
| superior vena cava | collects and carries blood from the upper body |
| inferior vena cava | collects and carries blood from the upper body |
| tricuspid valve | consisting of 3 leaflets |
| mitral (bicuspid) valve | consisting of 2 leaflets |
| aortic semilunar valve | permits blood to flow in only one direction-from the ventricle to the aorta |
| artery vascularizing the left side of the heart | right coronary artery |
| left coronary artery divides into two branches | left anterior descending artery and the circumflex artery |
| conduction tissue | has the sole function of initiating and spreading contraction impulses |
| cardiac tissue | SA and AV: sinoatrial node and atrioventricular node |
| sinoatrial node | located in the upper portion of the right atrium and possess its own rhythm |
| SA node is commonly known as | pacemaker |
| cardiac rate is altered by | autonomic nervous system |
| purkinje fibers | extend up the ventricle walls |
| Impulse transmission through the conduction system generates weak electrical impulses on the surface of the body. These impulses can be recorded on graph paper by an instrument called an | electrocardiograph |
| p wave | depolarization of the atria |
| QRS complex | depolarization of the ventricles |
| T wave | appears a short time later, repolarization of the ventricles |
| depolarization | (contraction) |
| repolarization | (recovery) |
| Bp | blood pressure |
| BP is the | force exerted by blood against the arterial walls during two phases of a heartbeat |
| systole | blood is forced out of the heart |
| diastole | ventricles are filling with blood |
| sphygmomanometer | measures blood pressure |
| Blood enters which chamber of the heart from the body? | right atrium |
| Blood enters what chamber of the heart from the lungs? | left atrium |
| What blood vessel brings blood to the heart from the body? | superior vena cava |
| What blood vessel leaves the heart to carry blood to the body? | aorta |
| The top chambers of the heart are called? | atria |
| The bottom chambers of the heart are called? | ventricles |
| What part of the heart delivers deoxygenated blood to the lungs? | right ventricle |
| The bicuspid valve is located on the _______ side of the heart. | left side |
| Blood leaves the right at atrium and enters the right ventricle through the _______ valve. | tricuspid |
| Blood leaves the left at atrium and enters the left ventricle through the _______ valve. | mitral valve |
| Blood that enters the right atrium is (oxygenated/deoxygenated). | deoxygenated |
| Blood that leaves the left ventricle is (oxygenated/deoxygenated). | oxygenated |
| factor 1 influencing BP | resistance in blood flow in blood vessels |
| factor 2 influencing BP | pumping action of the heart |
| factor 3 influencing BP | viscosity of blood |
| factor 4 influencing BP | elasticity of arteries |
| factor 5 influencing BP | quantity of blood in the vascular system |
Created by:
user-1960297