Glossary of HEART 2
Other Decks By This User
- Heart location
- -Thorax, mediastinum; left of midline.
-Function: self-adjusting muscular double pump; both pumps are concerted.
-Apex points down
-Base points up
- Covers the heart; has two layers:
- Fibrous Pericardium
- Outer layer of the heart covering
- Serous Pericardium
- Inner layer of the heart covering; in contact w/ epicardium.
- Heart layers
- external heart layer; continuous with the serous pericardium
-superficial to myocardium
- MUSCLE layer of the heart; contains blood vessels and nerves.
- inner layer of the heart tissue.
continuous with epithelial layers of attached vessels (great arteries/veins)
- Heart Chambers
- -Right Atrium
- Right Atrium input/output
- input: from superior/inferior vena cava
output: to right ventricle via right AV valve (tricuspid)
- Right Ventrical Input/Output
- Input: Right atrium via AV valve
Output: to pulmonary trunk, via the pulmonary semilunar valve
- left atrium input/output
- input: pulmonary veins carrying oxygenated blood
output: left ventricle via the left AV valve, tricuspid.
- Left ventricle input/output
- input: left atrium via left AV valve.
output: aorta to the arch.
- Great Vessels
- Superior/inferior vena cava
Pulmonary Veins (4)
- Heart Valves
- Right AV - tricuspid
Left AV - bicuspid
- Mitral Valve
- aka, Bicuspid right av valve
- Valve function
- to prevent backflow of blood into the ventricles/valves, but allow it to flow into the intended chamber.
- Bicuspid valve
- Left AV
-3x as thick as right, for strength to push blood through circulation.
- Function of chordae tendinae and papillary muscles
- when blood fills ventricles it pushes back on the AV valve; papillary muscles tense to prevent the AV valve from opening into the ATRIUM and allow blood to flow back. kind've like a parachute behind a drag-racing car.
- period of ventricular relaxtion as blood flows from atria to ventricles;
- when the AV valves slam shut and ventricular contraction begins to push blood out pulmonary and atrial semilunar valves.
- Heart Septa
- interatrial septum
- connective tissue that seperates the left/right atria
- interventricular septum
- division between the ventricles.
- Heart Sulci
- Coronary Sulcus
- superficial line that divides the atria from the ventricles. a "deep groove, boundary." vessels run within
- interventricular sulcus
deep groove/boundary dividing the ventricles from a superficial view.
- Trabeculae carnae
- muscles within the ventricular walls.
- papillary muscles
- attach to the ventricular walls; yank on chordae tendinae during ventricular contraction.
- chordae tendinae
- HEARTSTRINGS; attach to papillar muscles; passively restrain the valves so that when closed they won't blow open by blood trying to reenter atria
- Fossa ovalis
- an opening in fetal life between the atria; allows blood to bypass pulmonary circulation.
- Ligamentum arteriosum
- remnant of a fetal vessel; attaches the pulmonary trunk to the aortic arch
- Coronary Circulation
- supplies blood to the muscle tissue of the heart.
- Coronary arteries
- originate within aortic sinus, at base of ascending aorta; first branches, the best blood, highest blood pressure.
Emerge from the aortic arch as its first branches
- left coronary artery
- emerges from left aorta (of patient)
-runs within left coronary sulcus
Branch: LAD, anterior interventricular artery
- left anterior descending artery
-branch of left coronary artery
-runs within the interventricular sulcus; aka,
anterior interventricular artery
- circumflex artery
- -branch of left common carotid;
-runs within the coronary sulcus, then descends on posterior left side of heart.
- right coronary artery
- emerges from right aorta side
-runs within right coronary sulcus
-posterior interventricular artery
- posterior interventricular artery
- branch (after marginal) of right coronary artery;
-runs within interventricular sulcus of heart.
aka, posterior descending artery (as opposed to LAD)
- marginal artery
- branch of right coronary artery
-runs down right side of heart around apex.
- Veins of the heart
- -great cardiac vein
-middle cardiac vein
- great cardiac vein
- runs within interventricular sulcus with LAD artery; returns blood to the coronary sinus
- middle cardiac vein
- runs with posterior interventricular artery in interventricular sulcus;
returns blood to coronary sinus
- coronary sinus
- recieves blood from the great and middle cardiac veins (they actually join and become the sinus), returns to the right atrium. opens into right atrium just below fossa ovalis.
You must Login or Register to add cards