Bicarotid trunk The bicarotid trunk continues the brachiocephalic artery after it detaches the right brachial artery. It is directed forwards beneath the trachea above the jugular confluence. It is related laterally to the vagus and recurrent laryngeal nerves. At the thoracic inlet, it bifurcates into two common carotid arteries-right and left. Common carotid artery Each

Common carotid artery and it’s branches are- Bicarotid trunk and common carotid artery Occipital artery External Maxillary artery Superficial temporal artery Internal maxillary artery Terminal branches External carotid artery Blood supply to brain

Intercostal arteries Of the 13 pairs of intercostal arteries, the first intercostal arises form dorsal artery. The second to fifth pair form the sub costal artery and the rest from the thoracic aorta. These aortic intercostal arteries arise in pairs from the dorsal face of the thoracic aorta at regular intervals.  Their origins (of each pair)

Oesophageal artery is a Visceral and unpaired artery. It arises from the inferior face of the thoracic aorta and passes downwards and divides into branches to supply the thoracic part of the oesophagus, posterior mediastinal lymph gland and lungs.

Brachial artery is a Visceral unpaired artery. It is the nutrient artery of the lungs. It arises from the inferior face of the aorta, descends across the left face of the oesophagus where it divides into right and left bronchial arteries of which the right is larger. Each artery reaches the root of the corresponding lung

The coronary arteries are right and left. The right coronary arteryis small and it arises from the anterior sinus of the aorta. Coronary arteries then passes forwards and somewhat downward to the right between the conus arteriosus and the right atrium to the right coronary groove in which it curves around to the right and backwards

Common brachiocephalic trunk is a large vessel arising from the convexity of the aortic arch within the pericardium. It is directed upwards and forward and it measures about 10 to 13 cm. It is between the two layers of the anterior mediastinum and crossed on the left by the left Vagus and cardiac nerves and

The common aorta or aortic trunk is the main systemic arterial trunk. It begins at the base of the left ventricle passes backwards and forwards between the pulmonary artery on the left and right atrium on the right (first part-ascending aorta), turns upwards and backwards inclining slightly to the left, thus describing a curve called

The pulmonary veins are usually 4 to 7 in number and are devoid of valves. The capillaries arise from plexus around the alveoli of the lungs, unite to form larger branches accompanying the arterial branches on the ventral face of the bronchioles and finally form the pulmonary veins which open into the left atrium.

The pulmonary artery springs from the right ventricle at the conus arteriosus. It curves upward, backwards and medially and divides behind the aortic arch into right and left pulmonary arteries. It is related in front to the right atrium and behind to the left atrium and medially to the aorta. It is enclosed along with