7201932
Description
Flashcards by Kylie Miller, updated more than 1 year ago
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Created by Kylie Miller
almost 8 years ago
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| Question | Answer |
| Systemic Circulation | Blood flow to all body parts except lungs |
| Pulmonary Circulation | Flow of blood between heart & lungs only |
| CV Functions | Structures work together as an efficient system to pump blood to all body tissues, blood supplies oxygen & nutrients to tissues and transport cellular waste products |
| Heart | a muscular organ about the size of a fist, located just behind and slightly left of the breastbone. The heart pumps blood through the network of arteries and veins called the cardiovascular system. |
| Blood | 55% liquid plasma, 45% formed elements |
| Arteries | Transport blood away from heart to all body parts |
| Veins | Return blood from all body parts to heart |
| Capillaries | Permit exchange of nutrients & waste products between blood & cells |
| Septum | wall that seperates the 4 chambers |
| Atria | Two upper chambers of heart, receiving chambers and all blood vessels coming into heart enter here |
| Ventricles | Two lower chambers of heart, pumping chambers, all blood vessels leaving heart emerge from here |
| Tricuspid Valve | Controls the opening between the right atrium & right ventricle |
| Mitral Valve | Or bicuspid valve, located between left atrium and left ventricle |
| Aortic Semilunar Valve | Located between left ventricle and aorta |
| Pulmonary Semilunar Valve | Located between right ventricle and pulmonary artery, shaped like half-moon |
| Aorta | Largest blood vessel in body, main trunk of arterial system, begins from left ventricle |
| Vena Cava | Largest vein in the body. They return blood to the right atrium of the heart |
| Path of Deoxygenated Blood | Inferior/Superior Vena Cava --> R Atrium --> Tricuspid Valve --> R Ventricle --> Pulmonary Semi Valve --> Pulm Artery --> Lung Capillaries |
| Path of Oxygenated Blood | L Atrium --> Mitral Valve --> L Ventricle --> Aortic Semi Valve --> Aorta --> Arteries --> The Body |
| Diastole | Phase of the cardiac cycle when a heart chamber wall relaxes. |
| Systole | Phase of the cardiac cycle when a heart chamber wall contracts |
| Sinoatrial Node | Specialized tissue in the wall of the right atrium that initiates cardiac cycles; the pacemaker; SA Node |
| Atrioventricular Node | Specialized mass of cardiac muscl fibers in the interatrial septum of the heart: transmits cardiac impulses from the sinoatrial node to the AV bundle; AV node |
| Purkinje Fibers | Specialized muscle fibers that conduct the cardiac impulses from the AV bundle into the ventricular walls |
| Pacemaker | Mass of specialized muscle tissue that controls the rhythm of the heartbeat. |
| QRS Complex | Shows the contracation (stimulation) of ventricles, atria relax as ventricles contract |
| P Wave | Due to contraction (stimulation) of the atria |
| T Wave | Relaxation (recovery) of ventricles |
| Electrical Impulses | Know as conduction system, come from nerves, stimulate myocardium and determine rate and regularity of heart beat, controlled by sinoartrial node, atrioventricular node and bundle of His |
| Cardiac Output | A series of myocardial contractions and relaxations that constitute a complete heartbeat |
| Stroke Volume | The volume of blood that each ventricle discharges in a heartbeat |
| Peripheral Resistance | Resistance to blood flow due to friction between blood vessel walls 1. blood viscosity, 2. total blood vessel length, 3. blood vessel diameter |
| BP increase | Blood Flow Increase |
| Resistance Increase | Flow Decrease |
| Lumen | channel within blood vessels |
| Caused by the vibration and abrupt closure of the AV valves as the ventricles contract; this first sound is of longer duration and lower pitch than the second | First, or lub sound |
| Caused by the closing of both the semilunar valves when the ventricles undergo diastole(relax) | 2nd sound "dub" |
| arterial blood pressure is about | 120/80 |
| Where is the SA node located? | R Atrium |
| hemoglobin | an iron-containing pigment found in red blood cells, carries 97% of oxygen. |
| Cardiac Plexus | A combination of sympathetic and parasympathetic fibers and an area for the brain to talk to the heart. |
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