Presentation on theme: "Internal features of Heart Dr. Sama ul Haque. Objectives List the chambers of the heart. Describe the internal features of right atrium. Describe."— Presentation transcript:
Objectives List the chambers of the heart. Describe the internal features of right atrium. Describe the internal features of the right ventricle. Discuss internal features of the left atrium. Discuss the internal features of the left ventricle. Differentiate between right and left ventricles. Define conducting system of the heart.
Posterior wall of the right atrium: Opening of the superior vena cava Opening and valve of the inferior vena cava Opening and valve of the coronary sinus Fossa ovalis and the limbus fossa ovalis Anterior wall of the right atrium: Pectinate muscles Crista terminalis Right Atrium
Tricuspid valve has three cusps: anterior, septal, and posterior. Three papillary muscles: anterior, septal, and posterior. The anterior papillary muscle is the largest and most prominent. Trabeculae carneae (rough muscular ridges). Right Ventricle
The septomarginal trabecula (moderator band): extends from the interventricular septum to the base of the anterior papillary muscle. The conus arteriosus (infundibulum): is the cone-shaped portion of the right ventricle inferior to the opening of the pulmonary trunk. The pulmonary valve: consists of three semilunar cusps: anterior, right, and left. Right Ventricle
Valves of the Heart 1 2 3 4 1.Right Atrioventricular (Tricuspid) 2.Left Atrioventricular (Bicuspid or Mitral) 3.Pulmonary 4.Aortic
Fibrous Skeleton of the Heart Dense collagenous fibrous tissue framework lies at the junction of the atria with the ventricles. Includes: 1-Tricuspid fibrous annulus: 2-Mitral fibrous annulus 3-Pulmonary fibrous annulus: 4-Aortic fibrous annulus Functions: 1-Supports the valves. 2-Electrically separetes atria from ventricles.
Sinu-Atrial Node (S-A Node) Sinu-Atrial Node (S-A Node) Atrio-ventricular Node (A-V Node) Atrio-ventricular Node (A-V Node) Atrio-ventricular Bundle Atrio-ventricular Bundle Right and left Bundle branch Right and left Bundle branch Purkinje Fibers Purkinje Fibers Conducting system of Heart