3.4 Blood Supply to the Heart, Innervations, and Lymphatics

Left coronary artery

Right coronary artery

name the arteries supplying the heart (2)

Great cardiac vein

Middle cardiac vein

Right cardiac vein

name the veins collecting from the heart (3)

Great cardiac vein

parallel to the left coronary vein; its dilated terminal end is called coronary sinus, where most of the blood from the heart is returned to the right atrium

Middle cardiac vein

ascends in the subsinousal interventricular groove near the subsinousal interventricular artery; it collects blood from both ventricles and empties into the coronary sinus

Right cardiac vein

opens into the cavities of the heart directly

Sympathetic

• cervical cardiac nerves

• caudal thoracic nerve

Parasympathetic

• vagus nerve

innervations of the heart (3)

Mediastinal lymph nodes

Tracheobronchial lymoh nodes

name the lymphatics of the heart (2)

Mediastinal lymph nodes

related variously into the larger blood vessels in front of the heart; it consists of cranial and caudal mediastinal lymph nodes

Tracheobronchial lymoh nodes

are scattered at the termination of the trachea and the principal bronchi