Chambers of Heart

Right Atrium The right upper chamber of the heart receives venuses blood from the whole body, pumps it into the right ventricle through the tricuspid opening or right atrioventricular C opening It forms the anterior border part of the upper borde, sternocostal surface & base of the heart. External Features: - Elongated vertically in receives superior vena cava, the upper end of fervour vena cava, and the lower end. - Right Auricle prolonged upper end toward the left forms the risk tight awarded simulates terminates Along the right border there is a shallow groove passing fran surprise vena cave to inferior vena cave in ben Crista terminalis Sulcus terminalis is formed due to crista terminalis will orde Sinwatrial SA node: situated in upper part of Sculeus terminals Howarth Atrioventricular groove - separates the right atrium from the right ventricle Tributaries of the Right Atrium convince & Superior vena cavs 2) Inferior hena cava 3) 4) Coronary sinus anterior cardiac veins. Venal cordis minimal (the besian veins) - 6 sometimes the right marginal. vein Internal features: It is divided into 3 parts 1) smooth Posterior Parto sinus venarum. This part receives mast of the tributaries It recives te bursaries except Antrace cardiac veir 2) Rough Anterior part 6 Pectinats part Crista terminalis- Musculi pectinat - It is a muscular ridge. trans verse muscular ridges arising from crista terminalis 3) Intecatrial septum. Fossa ovalis shall saucer-shaped depression in the lever part Annulus ovalis - prominent margin of fossa ovaly Right ventriclenerget →triangular chamber → receives blood from right atrium I pump inte the lungs through the pulmonary trunk & pulmonary antiues. Border & surface! - A forms inferior border & sternocostal surface entice surface External features: It has two surfaces: Anterive Sternocastal surface 2) Inferior diaphragmatic surface Inferior has two parts: Infleruing part - tough due to presence of muscular ridges called trabecular coincas coutflerving part - smooth & forms the upper conical part of right ventricle The two parts are separated by muscular ridge called the supraventricular crest as infund puloventricuku crest. Internal features and The internal shorus two orifices: Right atrioventricular tricuspid orifice - guarded by Jrricuspid value Pulmonary orifice guarded by pulmonary value Trabeculas carnage (or) types muscular ridges of there 1) Ridgesto 2) Budges 3) pillarso dari al benefit mabing so How wonin's t envisto est admi asgo cries fransiting out Pillars are also brettucen papillary muscles It has got I end alttached to the ventricular valne and other end is connected to the tricuspid vahi the right the chordal lendings There are 3 papillary muscles! Anterior 2) Pastercr 3) Septal tang Interventricular seplam It separates right & left vantuck Left Atrium: quadrangular chamber situated passively. left auricle projects anterior to overlap infundibulum of right ventricle, forms left 2/3 of the bare of the heart greater part of upper border centost lemettre parts of steeno costal surface - left surface di left borders interesantes te pist receives oxygenates blood from fore pulmonery veins, pumps it to left ventricle, through left atrioventricular licuspid miteal orifice. Features: →Post surface firms anterior wall of the pericardium of oblique sinus The anterior wall is formed by interatrial septum →Jwo pulmonary veins open into the atrium. an each side of past wall. → Muscult pectinate are present only in the aurch deft ventricle: → recives oxygenated blood from the left atrium pumps to autta baul It forms Apes of the heart Sternotostal surface mast of left border hard to enabuk - loft two-thirds of diaphragmatic surface camlov Features: Externally: It has 3 surfaces. Antrion sternocaster surface Inferior or Lip diaphragmatic surface (1 began left Internally: It is divided into Iwo parts ( Dlormer Rough part with trabeculae carneal Upper smooth part 6 acute vestibule gives origin 6 ascending aveta It has 2 orifices internally gris i st left atrioventricular ficuspid Cog mitral orifices guarded by bicuspid on mitral value in orifce guarded by acetic → Contains low. valne strong papillary muscle, → Carity is circular walls are much thicker than right van trick 3 times thicker than right ventricle deve