Anatomy Topic 2 Case 5 Flashcards
Where does the right coronary artery arise?
- Right aortic sinus in the ascending aorta
Outline the course taken by the right coronary artery
- Descends vertically in coronary sulcus (between right atrium and ventricle)
- Turns posteriorly at the inferior margin onto the diaphragmatic surface and base of the heart
Outline the pathway taken by the atrial branch of the right coronary artery
- Passes in the groove between right auricle and ascending aorta
- Gives off sinu-atrial node which passes posteriorly around superior vena cava
Outline the pathway taken by the right marginal branch of the right coronary artery
- Approaches inferior margin of heart
- Towards apex of the heart
Outline the pathway taken by the posterior interventricular branch of the right coronary artery
- Lies in the posterior interventricular sulcus
Where does the left coronary artery arise?
- Left aortic sinus of ascending aorta
Outline the course taken by the left coronary artery
- Passes between pulmonary trunk and left auricle
- Enters coronary sulcus
Outline the course taken by the left anterior descending artery
- Continues around left side of pulmonary trunk
- Descends obliquely towards apex of the heart
- In the anterior interventricular septum
Outline the course taken by the circumflex artery
- Courses through coronary sulcus onto diaphragmatic surface
- Gives off left marginal artery
Identify the structures supplied by the right coronary artery
- Right atrium
- SA and AV nodes
- Posterior third of interventricular septum
- Diaphragmatic surface of right ventricle
Identify the structures supplied by the right coronary artery
- Left atrium
- Left ventricle
- Anterior two thirds of interventricular septum
- Anterior surface of right ventricle
Identify the course taken by the greater cardiac vein
- From apex it ascends in the anterior interventricular sulcus
- Turns to the left at the coronary sulcus and continues to the diaphragmatic surface of the heart
- Enlarges to form coronary sinus
- Which enters right atrium adjacent to inferior vena cava
Identify the course taken by the middle cardiac vein
- From apex it ascends in the posterior interventricular sulcus
- Towards coronary sinus
Identify the course taken by the small cardiac vein
- Begins in the lower anterior section of the coronary sulcus
- Continues in this groove onto the diaphragmatic surface of the heart
- Enters the coronary sinus at its atrial end.
- It may receive the right marginal vein.
Identify the course taken by the posterior cardiac vein
- Posterior surface of left ventricle to the left of the middle cardiac vein
- Enters coronary sinus or joints great cardiac vein
Where are the veins of Thebesius located?
- Between right atrium and ventricle
What is the moderator band?
- Muscular band of heart tissue in the right ventricle of the heart.
- Extends from the base of the anterior papillary muscle to the ventricular septum.
Where is the superficial part of the cardiac plexus located?
- Inferior to aortic arch between it and the pulmonary trunk
Where is the deep part of the cardiac plexus located?
- Between aortic arch and tracheal bifurcation
Sympathetic Innervation
- Preganglionic neurones arise [A]
- Stimulation [B} heart rate and contraction force
- Postganglionic neurones release [C]
- Postganglionic nerve cell bodies are located at [D]
- Stimulation [E] coronary vessels
- [A] CNS at spinal segments T1-T6
- [B] Increases
- [C] Noradrenaline
- [D] Paravertebral Ganglia
- [E] Dilate coronary vessels
Parasympathetic Innervation
- Preganglionic neurones are contained within [A]
- Stimulation [B} heart rate and contraction force
- Postganglionic neurones release [C]
- Postganglionic nerve cell bodies are located at [D]
- Stimulation [E] coronary vessels
- [A] Vagus Nerve
- [B] Decreases
- [C] Acetylcholine
- [D] The walls of the atria
- [E] Constricts
Through which vessels is oxygenated blood delivered to the foetus?
- Umbilical Vein
Through which vessels is oxygenated blood returned to the placenta?
- Internal iliac arteries
- Umbilical Arteries
What is the function of the Foramen Ovale?
- Allow blood to bypass from right atrium into left atrium
What is the function of the Ligamentum Venosum?
- Allow blood to bypass liver into inferior vena cava
What is the function of the Ductus Arteriosus?
- Allow blood to bypass from right ventricle to descending aorta
- To avoid pulmonary vessels
What does the obliterated umbilical vein form?
- Ligamentum Teres
What does the obliterated ductus venosus form?
- Ligamentum Venosum
What does the ductus arteriosus form?
- Ligamentum Arteriosum
What does the foramen ovale become
- Fossa Ovale
