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Lecture 23 Heart and Great Vessels
Terms in this set (35)
1. umbilical v.
3. hepatic vv. & ductus venous
4. inferior vena cava
5. R. Atrium to L. Atrium via foramen ovale
6. Aorta to head upper limb and heart
7. Superior Vena Cava
8. R. Atrium to R. ventricle- to pulmonary aa.
9. Ductus arteriosus
11. umbilical aa.
Vein relative to the circulatory system of fetus. Turns into the ligamentum teres hepatis
Receives about half of the blood from the ductus venous
Becomes the ligamentum venousum after birth
Becomes the ligamentum arteriosus after birth. Attaches to the distal part of the aortic arch so fetal blood will continue into the descending aorta
Of the internal iliac a. Blood continues to the lower limbs and abdominal pelvic viscera. After birth forms the medial umbilical ligaments
Double walled sac of butter fibrous parietal layer and inner serous parietal layer. Innermost layer of serous visceral parietal.
The space between (inner) serous parietal and serous visceral pericardium. The two layer oppose each other and reduce friction when the heart beats.
composed of 4 chambers. An apex at the bottom, and a base towards the top. Anterior, posterior, and diaphragmatic surfaces.
Borders of the heart
1.Right Border: vertical along costal cartilages 3-6
2. Inferior Border: R. border to apex of heart behind xiphisternal junction
3.Left: from apex of heart to 2nd costal cartilage and sternum
4. Superior: behind the sternal angle
Deoxygenated blood from the body from Superior Vena Cava, Inferior Vena Cava, and Coronary Sinus drain in. Pectinate muscles and crista terminals where SA node would be. Tricuspid Valve.
The ending of the pectinate muscles in the right atrium. Superior portion is where SA node would be.
3 papillary muscles (anterior, posterior, and septal papillary). Chordae tendinae connect papillary mm. to Tricuspid valve. Trabeculae Carnae muscles on the wall. Moderator band. Sends blood to lungs via pulmonary trunk (aa.)
Stabilize the atrioventricular cusps. Prevent backwards flowing/ regurgitation of blood back into the right atrium during systole
Connect the papillary muscles to AV valves to help close.
Septomarginal Trabecular. Connects the anterior and septal papillary muscles to conduct signals.
Receives oxygenated blood via the pulmonary veins (4 total). Forms the posterior base of the heart. Passes blood via mitral/bicuspid valve
2 papillary muscles (anterior and posterior). Chordae tendinae and trabeculae carnes. Sends oxygenated blood to body via aorta.
Aortic Valve fxn.
Prevent backward flow of aortic arch into the left ventricle during diastole.
Arise from the root of the aorta to supply blood to the heart. Right (coronary sulcus) and Left coronary aa. (inter ventricular groove)
Right Coronary a.
Runs in coronary sulcus. Supplies blood to right atrium and ventricle. Gives off the right marginal a. (runs with small cardiac v.). Anastomoses posteriorly with left circumflex branch
Left coronary a.
Runs in intraventicular groove. Supplies blood to left atrium and ventricle. Gives off to left circumflex branch, Left anterior descending( great cardiac v.), and Posterior intraventricular branch (middle cardiac v.)
Venous system of heart
Great cardiac v. runs with the Lateral anterior descending a. Middle cardiac v. runs with posterior intraventricular a. and Small cardiac v. runs with right marginal a. They all drain into the coronary sinus
Receives drainage via great cardiac v. middle cardiac v. and small cardiac v. Drainage enters the right atrium
Sinuatrial Node (SA node)
The pacemaker. Located at the superior portion of the crista terminalis of the right atrium. 60-70 beats per min. Increased by sympathetic stimulation and decreased by vagal stimulation
Located posterior inferior part of the intratrial septum. Impulses from both atria converge at the AV node and distributes it to the AV bundle onto the AV branches.
Located at the intraventricular septum. Receives signal from AV node and divides into R & L bundle branches to travel rapidly to the apex and then contract upward.
The closing of the AV values early in systole.
Left Bicuspid Valve "LUB" located at the apex of the heart and 5th intercostal space.
Right side "LUB" located at the left inferior portion of the body of the sternum.
Left heart. Located at the right 2nd intercostal space at the right edge of the sternum.
From the right heart. Located at the left of the sternum at the 2nd intercostal Space
Detected at the apex of the heart. Problems with the AV mitral valve.
Detected at the right sternum at the second intercostal space. Problems with the aortic valve.
Brings deoxygenated blood from the thorax to the inferior vena cava. Provides an alternate pathway.
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