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Branches of thoracic aorta in animals ppt
- 2. 1. coronary arteries rightand left. right coronary artery small anterior sinus of aorta b/w conus arteriosus and right atrium to the right coronary groove curves around to the right and backwards to anastomose with the left coronary artery at RLG
- 3. The left coronaryartery larger left posterior sinus of aorta emerges behind the origin of the pulmonary artery gives off in its course dorsal and ventral branches to wall of the aorta divides into descending branch AND circumflex branch descending branch - left longitudinal groove circumflex branch - coronary groove, gives off a branch in the intermediate groove curves to right and descends into the right longitudinal groove Venous blood from myocardium - right and left ascending coronary veins Accompany descending branch of left coronary artery Join to GREAT CARDIAC VEIN GCV + VHA open into CORONARY SINUS
- 4. 2. COMMON BRACHIOCEPHALICTRUNK (CBCT) Convexity of the aortic arch 10 to 13 cm anterior mediastinum left side - vagus and cardiac nerves right side - anterior vena cava opposite to 2ND ICS brachiocephalic and left brachial arteries brachiocephalic - beneath the trachea Opposite first rib - right brachial artery continued as bicarotid trunk right and left common carotid arteries.
- 6. 3. BRONCHIAL ARTERY Visceralunpaired nutrient artery of the lungs posterior face of the aorta left face of the oesophagus right and left bronchial arteries right is larger reaches the root of the lung passes on dorsal face of bronchi 4. OESOPHAGEAL ARTERY Visceral unpaired posterior face of thoracic aorta supply the thoracic part of the oesophagus
- 7. 5. INTERCOSTAL ARTERIES Parietalpaired 13 pairs first intercostal arises from dorsal artery second to fifth pair from sub costal artery rest from thoracic aorta dorsal face of the thoracic aorta pass upwards across the bodies of the dorsal vertebrae cross the vena hemiazygos on the left reach upper part of ICS - gives off branches to the pleura and vertebra divides into a dorsospinal and an intercostal branch dorsospinal branch divides into spinal and muscular branches intercostal branch reaches the posterior border of the rib runs down in company with the nerve and vein perforating intercostal arteries - serratus thoracis and abdominal muscles and skin terminal branches anastomose with ascending branches of the internal thoracic and musculophrenic arteries
- 8. 6. PHRENIC ARTERIES Parietalunpaired two or three branches arise either directly from thoracic aorta / coeliac artery / left ruminal artery / intercostal supply the crura of diaphragm
- 9. BRACHIAL ARTERIES left brachialartery - branch of CBCT right brachial artery - branch of BCA Each brachial artery - towards the thoracic inlet medial face of the first rib winding round the anterior border of the first rib below insertion of scalenus ventralis reach the axilla brachial plexus included in the loop formed by musculocutaneous and median nerve turns distally on the medial surface of the arm below its medial condyle - median artery in front and in contact is median nerve
- 10. 1. INTRATHORACIC BRANCHESOF BRACHIAL ARTERY (1) A common trunk dorsal face of brachial artery close to its origin divides into subcostal, dorsal or costo-cervical, deep or superior cervical and vertebral arteries subcostal artery ventral aspect of the bodies of the thoracic vertebrae second to the fifth intercostal arteries dorsal artery (costo cervical) small leaves thoracic cavity in front of first costotransverse articulation first intercostal artery then passes deeply to supply complexus, splenius, serratus cervicis, rhomboideus and trapezius.
- 12. deep cervical artery(superior cervical) superior face of the vertebral artery level of the transverse process of the seventh cervical vertebra passes on deep face of complexus supplies all the muscles of the lateral cervical group, ligamentum nuchae and skin vertebral artery large emerges between scalenus and longus colli, under transverse process of the seventh cervical vertebra detaches superior cervical artery enters foreman transversarium of the sixth cervical vertebra In its course gives branches to the intertransversales colli, spinal cord and its meninges b/w the second and the third cervical vertebrae detaches a thick muscular branch enters the spinal canal run in floor of this canal divide in the ring of atlas into medial and lateral medial branch or cerebrospinal artery - joins the rete mirabile cerebri lateral branch - a twig to the rete mirabile, emerges out through intervertebral foramen of atlas to supply the muscles
- 13. 2. INTERNAL THORACICARTERY large vessel ventral face of brachial artery opposite the first rib terminates into musculophrenic and anterior abdominal arteries Collateral Branches: At each ICS - dorsal and ventral branches dorsal branches anastomoses with the intercostal arteries of the aorta ventral branches - transversus thoracis, pleura, pericardium perforating intercostal arteries anastomose with branches of external thoracic artery In the young animals - some branches to the thymus musculophrenic - groove between the 8th and 9th costal cartilages diaphragm, intercostal muscle and transversus abdominis anterior abdominal artery pass b/w the 9th costal cartilage and xiphoid cartilage deep face of rectus abdominis anastomoses with branches of posterior abdominal artery
- 14. 3. INFERIOR CERVICALARTERY dorsal face of brachial artery just before it winds round the first rib downwards and forward deep face of brachiocephalicus supplies posterior cervical lymph glands, brachiocephalicus, omotransversarius, prescapular lymph glands and supraspinatus