Term
|
Definition
| Carry blood away from the heart |
|
|
Term
|
Definition
| Carry blood back to the heart |
|
|
Term
|
Definition
| right atrium, right ventricle, pulmonary arteries and veins, conveys blood to the lungs via pulmonary arteries and returns it to the heart via pulonary veins |
|
|
Term
|
Definition
| left atrium, left ventricle, carries blood to peripheral organs, Arota (systemic artery) carries blood to body, superior and inferior vena cava (veins) carry deoxygenated blood back to heart. |
|
|
Term
|
Definition
| fibrous sac and serous lining that contains the heart |
|
|
Term
|
Definition
| outermost layer, dense connective tissue, attached to diaphram and great vessels |
|
|
Term
|
Definition
inner portion of the pericardium
1) Parietal layer - lines teh inner surface of the fibrous pericardium
2) Visceral layer - covers the outside of the heart |
|
|
Term
|
Definition
Thin space between the parietal and visceral layers of the serous pericardium.
Serous fluid is secreted to lubricate the serous memebrance and facilitate the almost frictionless, continuous movement of the heart between beats. |
|
|
Term
|
Definition
outermost layer of the heart also known as visceral layer of the serous pericardium.
Composed of serous membrane and areolar connective tissue
|
|
|
Term
|
Definition
| Middle layer of the heart, composed of cardiam muscle tissue. |
|
|
Term
|
Definition
Interal surface of the heart, external surface of the heart valve are covered in endocardium.
Composed of simple squamous epithelium and a layer of areolar connective tissue. |
|
|
Term
| Pathway of blood through heart and lungs |
|
Definition
Right atrium à tricuspid valve à right ventricle
Right ventricle à pulmonary semilunar valve à pulmonary arteries à lungs
Lungs à pulmonary veins à left atrium
Left atrium à bicuspid valve à left ventricle
Left ventricle à aortic semilunar valve à aorta
Aorta à systemic circulation |
|
|
Term
|
Definition
| forms thin wall between the left and right atrium |
|
|
Term
|
Definition
| forms a thick wall between the right and left ventricle |
|
|
Term
|
Definition
| Sound the heart makes when the AV valves close |
|
|
Term
|
Definition
| Sound heart makes when the semilunar valves close |
|
|
Term
|
Definition
|
|
Term
|
Definition
|
|
Term
|
Definition
| Mechanically and electrically link cells together and permit the immediate passage of muscle impulses |
|
|
Term
|
Definition
| provides low resistance pathway across rteh memebranes of adjoining cardiac muscle cells allowing unrestricted passage of ions required for synchronous beating of cardiac muscle cells |
|
|
Term
|
Definition
heartbeat is initiated by the specialized cardiac muscle cells of the SA node.
Located in the posterior wall of the right atrium. Also called pacemaker.
Parasympathetic innervation |
|
|
Term
|
Definition
located in the floor of the right atrium
slows conduction of the impulse as it travels from the atria to the ventricles providing delay between activation and contraction of the ventricles. |
|
|
Term
| AV bundle (bundle of His) |
|
Definition
| recieves muslce impulse from the AV node and extends into the interventricular septum before dividing into left and right bundles. |
|
|
Term
|
Definition
| conduction fibers, begin at apex of the heart, recieve impulse from left and right bundles |
|
|
Term
| Sympathetic nervous system |
|
Definition
| stimulation is activated by stress, anxiety, excitement, or exercise |
|
|
Term
| Parasympathetic Nervous System |
|
Definition
| Stimulation is medicated by acetylcholine and opposese the SNS. |
|
|
Term
| Extrinsic Innervation of the heart |
|
Definition
Heart is stimulated by the sympathetic cardioacceleratory center
Heart is inhibited by the parasympathetic cardioinhibitory center |
|
|
Term
|
Definition
| Contraction of the heart muscle, blood is sent from atrium to ventricle or ventricle to artery |
|
|
Term
|
Definition
| relaxation of the heart muscle, chamber fills with blood |
|
|
Term
|
Definition
|
|
Term
|
Definition
|
|
Term
|
Definition
|
|
