Exercise 35 Anatomy of the Heart Gross anatomy

Exercise 35 Anatomy of the Heart Gross anatomy

Exercise 35 Anatomy of the Heart Gross anatomy of the heart Localized in the mediastinum

It has a pointed apex At the level of the 5th intercostal space And a broad base Beneath the 2nd rib Is the site of emerging of the great vessels The pericardium

Pericardial cavity Visceral pericardium or epicardium Parietal pericardium Pericardial fluid Pericardial sac (fibrous)

Stabilizes the heart and its vessels Pericarditis The Location of the Heart in the Thoracic Cavity Figure 20.2c Gross anatomy of the heart

Myocardium Muscle wall of the heart Fibrous skeleton of the heart Endocardium Superficial Anatomy of the Heart

The heart consists of four chambers Two atria Two auricles Two ventricles Major blood vessels of the heart include Inferior and superior vena cavae

Aorta, pulmonary trunk and pulmonary veins The Superficial Anatomy of the Heart The Superficial Anatomy of the Heart Figure 20.3b, c

The superficial Anatomy of the heart Atria Thin walled upper chambers that receive blood from the vena cava Ventricles

Thick walled lower chambers separated from the atria by AV valves External anatomy of the heart and blood flow

Right atrium (RA) Receives blood coming from the body via superior, inferior vena cava and coronary sinus auricle Right ventricle (RV) Receives blood from the RA and pumps it into the pulmonary trunk Pulmonary trunk Left and right pulmonary arteries

External anatomy of the heart and blood flow Lungs Pulmonary veins

2 rights and 2 lefts Left atrium (LA) Receives blood from the pulmonary veins Auricle External anatomy of the heart and blood flow

Left ventricle (LV) Pumps blood into the aorta Aorta Ascending, arch, descending Ligamentum arteriosum Remnant of the ductus arteriosus Between pulmonary artery and aorta

Blood supply to the heart Coronary arteries and coronary sulcus Right Posterior interventricular artery Marginal Supplies posterior part of the ventricles and lateral part of the right heart

Blood supply to the heart Left coronary Anterior interventricular artery Circumflex Supplies the anterior part of the ventricles and laterodorsal part of the heart

Anterior and posterior interventricular sulci Blood Supply to the Heart veins Veins that empty into the coronary sinus Great cardiac vein (anterior interventricular) , Middle cardiac vein (posterior interventricular), Small cardiac vein

Coronary Circulation Figure 20.9a, b The Sectional Anatomy of the Heart Internal anatomy of the heart

Right atrium Fossa ovalis Foramen ovale Openings of the superior and inferior vena cavas Pectinate muscle SA and AV nodes Interatrial septum Wall between atria

Internal anatomy of the heart Right ventricle Tricuspid valve Chordae tedineae Papillary muscles Trabeculae carneae muscular ridges Interventricular septum Wall between ventricles

Internal anatomy of the heart Moderator band (septomarginal band) Horizontal muscular ridge Brings the impulse to the papillary muscles Only present in the RV Conus arteriosus Conical pouch from which the pulmonary

artery arises Internal anatomy of the heart Left atrium Principal cavity (sinus) Pectinate muscles on the auricle only Openings of the pulmonary veins

Internal anatomy of the heart Left ventricle Bicuspid valve Trabeculae carneae Papillary muscles Chordae tendineae Valves of the Heart

Figure 20.8a Valves of the Heart Figure 20.8b Valves of the heart

Bicuspid or mitral or left AV Tricuspid or right AV Aortic semilunar Pulmonary semilunar The intrinsic conducting system

Functional syncytium Gap junctions The intrinsic conducting system The intrinsic conducting

system Controlling system over the heart Autonomic nervous system Sympathetic Parasympathetic Intrinsic conducting system or nodal system Specialized myocardial tissue

Initiates the heart beat The Intrinsic Conducting System The conducting system includes: Sinoatrial (SA) node (80-100 bpm) Contain the pacemaker cells Located in the right atrium

Atrioventricular (AV) node (40-60 bpm) Located in the atrium septum at the junction of the atria and ventricles The Intrinsic Conducting System AV bundle or bundle of His Located in the interventricular septum Right and Left bundle branches Located in the interventricular septum

Purkinje fibers Located in the myocardium Larger in the left ventricle Steps for the heart beat

SA node begins the action potential Stimulus spreads across the atria Stimulus spreads to the AV node Atrial contraction Impulse then travels through the AV bundle Impulse reaches right and left bundle branches

Steps for the heart beat Then it reaches the Purkinje fibers Impulse reaches the papillary muscles (via moderator band on the right side)

Impulse is spread to the ventricles Ventricular contraction The Intrinsic Conducting System Pulmonary and systemic circulation Pulmonary circulation

Pulmonary arteries Leave the RV Carry blood rich in CO2 Blood flows to the lungs Pulmonary veins Leave the lung

Blood rich in O2 Blood flows to the LA Systemic circulation Aorta Leaves the LV

Blood rich in O2 Blood flows to the body Vena cava Superior brings blood from head, neck, arms and superior trunk Inferior brings blood from the rest of the body Blood rich in CO2 Blood flows to the RA Microscopic anatomy of the

heart Involuntary Cardiac cells Intercalated discs Branching Central nucleus Striations

Identify these structure on the fresh heart RA Auricle Pectinate muscles Superior and inferior vena cavas Coronary sinus

Tricuspid valve Identify these structure on the fresh heart RV Papillary muscles Chrodae tendineae Trabeculi carneae

Moderator band Pulmonary trunk and its semilunar valve Identify these structure on the fresh heart LA Auricle Pectinate muscles

Identify these structure on the fresh heart LV Myocardium Papillary muscles Chordae tendineae

Mitral valve Trabeculi carneae Interventricular septum Aorta and its semilunar valve Coronary arteries

Recently Viewed Presentations

  • Welcome to PRIME+

    Welcome to PRIME+

    Welcome to PRIME+ **Sit at a table with at least 3 people you don't know!** Year 4 : Day 1. December 16, 2014. Upon entry, teachers should have received their focus book, "5 Practices for Orchestrating Productive Mathematical Discussions".
  • Presentación de PowerPoint

    Presentación de PowerPoint

    d) Casas de Lunch, Servicios de Banquetes y/o Lunch, Concesiones de Clubes, Rotiserías y Casas de Venta de Comidas; Heladerías con o sin servicio de salón, Colonias de vacaciones particulares, sindicales, empresarias o gubernamentales.
  • DESRON 15 MEDICAL MEETING 26 AUG 2016 MEETING

    DESRON 15 MEDICAL MEETING 26 AUG 2016 MEETING

    Initial Green H packages are due to DESRON 15 Medical the week of Thanksgiving(or when you pull back in). Submit in 3 ring binder, with all content broken down by Enclosures. Include copy of your own self assessment check sheet....
  • Machining - Texas A&M University

    Machining - Texas A&M University

    Times New Roman Default Design Machining Certification General machine shop skills First pieces to make Project 1 - Mounting post Lathe Mounting post - part 2 Tapping Project 2 - Micro-rail vertical mount Mill Drill press Safety review
  • Pilot H Box præsentation - Migatronic

    Pilot H Box præsentation - Migatronic

    If the lamps for pulse times flash for 5 seconds, it may be caused by an adjustment of the pulse setting. Pulse time and base time are hereby changed automatically to 0.03 seconds. TIG electrode preheating When starting the TIG-AC...
  • Sodium and your health - Department of Nutrition and Food Science

    Sodium and your health - Department of Nutrition and Food Science

    Effects of sodium intake in heart failure: low-sodium intake may have varied effect on heart failure. Intravascular volume contraction improves hemodynamics and reduces diuretic requirement, congestion, and myocardial wall stress, leading to compensated heart failure.
  • Texto - Loudoun County Public Schools

    Texto - Loudoun County Public Schools

    I. What is Biology? Biology - study of life, of all living things. Many branches: biochemistry, cell biology, genetics, evolutionary theory, microbiology, botany ...
  • ECE 15B Computer Organization Spring 2010 Dmitri Strukov www ...

    ECE 15B Computer Organization Spring 2010 Dmitri Strukov www ...

    ECE 15B Computer OrganizationSpring 2010Dmitri Strukov. Lecture 1: Introduction. Partially adapted from Computer Organization and Design, 4th edition, Patterson and Hennessy, and classes taught by Patterson at Berkeley, Ryan Kastner at UCSB and Mary Jane Irwin at Penn State