Heart Lab

  1. where are the trabeculae carnae
  2. rounded or irregular muscular columns which project from the inner surface of the right and left ventricles of the heart. These are different from the pectinate muscles, which are present in the right atrium and the atrial appendages of the heart.
    trabeculae carnae
  3. where are the chordae tendineae?

    • The chordae tendineae are strong, fibrous
    • strings attached to the leaflets (or cusps) of the heart on the ventricular side; i.e., the lower chamber. These strings originate from small mounds of muscle tissue, the papillary muscles, which project inward from the walls of the ventricle.
  4. Where are the papillary muscles

    The papillary muscles are muscles located in the ventricles of the heart. They attach to the cusps of the atrioventricular valves (also known as the mitral and tricuspid valves) via the chordae tendineae and contract to prevent inversion or prolapse of these valves on systole (or ventricular contraction).
  5. where is the ligamentum arteriosum?
    • At the superior end, the ligamentum attaches to the aorta, the other, inferior end, the ligamentum is attached to the top of the left pulmonary artery
    • ligamentum_arteriosum_probe
  6. where are perkinje fibers?
    • located in the inner ventricular walls of the heart. The Purkinje fibers are specialised conducting fibers larger than cardiomyocytes with fewer myofibrils and a large number of mitochondria that are able to conduct cardiac action potentials more quickly and efficiently than any other cells in the heart.
    • screen_shot_2015-04-23_at_83313_pm-14CE8D80A0C72919B65
  7. what and where are the bundle branches?
    • The bundle branches are offshoots of the bundle of His in the heart's ventricle. They play an integral role in the electrical conduction system of the heart by transmitting cardiac action potentials from the bundle of His to the Purkinje fibres.
    • screen_shot_2015-04-23_at_83313_pm-14CE8D80A0C72919B65
  8. Where is the circumflex artery
    • It follows the left part of the coronary sulcus, running first to the left and then to the right, reaching nearly as far as the posterior longitudinal sulcus.
    • coronary_arteries_21315861521968
  9. where is the coronary sinus?

    a wide venous channel about 2.25 centimeters in length that receives blood from the coronary veins and empties into the right atrium of the heart.
  10. Where is the great cardiac vein?
    • Figure6
    • The great cardiac vein (left coronary vein) begins at the apex of the heart and ascends along the anterior longitudinal sulcus to the base of the ventricles.
    • It then curves to the left in the coronary sulcus, and reaching the back of the heart, opens into the left extremity of the coronary sinus.
  11. where is the anterior inverventricular artery?
    • Image Upload 1
    • It passes at first behind the pulmonary artery and then comes forward between that vessel and the left auricula to reach the anterior interventricular sulcus.
  12. where is the middle cardiac vein?
    • The middle cardiac vein commences at the apex of the heart; ascends in the posterior longitudinal sulcus, and ends in the coronary sinus near its right extremity.
    • Image Upload 2
  13. Where is the posterior interventricular artery
    • Image Upload 3
    • The position of the artery is not really posterior, but inferior.
  14. Where is the marginal artery? .
    • Image Upload 4
    • The right marginal branch of right coronary artery (or right marginal artery) is a large marginal branch which follows the acute margin of the heart and supplies branches to both surfaces of the right ventricle.
Card Set
Heart Lab
Heart Lab