Opening of inferior vena cava is guarded by

Article: • • • • • • Images: • Gross anatomy The inferior vena cava is formed by the confluence of the two Tributaries • T8: paired • T8: 3 • L1: right • L1: • L2: right • L1-L5: • L5: Since the IVC is not a midline structure, there is a degree of asymmetry of drainage, e.g. the gonadal and suprarenal veins drain into the IVC on the right side, but into the left renal vein on the left. Relations • anterior: right • posterior: lumbar vertebrae, intervertebral discs, • lateral (left): • lateral (right): right Development The normal IVC has a complex embryological development with many embryological veins contributing to many different parts: • right vitelline vein: forms suprahepatic and hepatic segments of IVC • right subcardinal vein: forms suprarenal segment • right subsupracardinal anastomosis: forms renal segment • right supracardinal vein: forms infrarenal segment • right posterior cardinal vein: forms distal most IVC and its bifurcation into common iliac veins Variant anatomy Inferior 3: • absence of IVC (entire or only the infrarenal segment) • • • • • • • extrahepatic portocaval shunt ( • Rarely a Related pathology • • • 1. Standring S (editor). Gray's Anatomy (39th edition). Churchill Livingstone. (2011) ISBN:0443066841. • 2. Schuenke M, Schulte E, Schumacher U et-al. Thieme Atlas of Anatomy. Thieme Publishing Group. (2006) ISBN:3131420812. • 3. Smillie RP, Shetty M, Boyer AC et-al. Imaging evaluation of the inferior vena cava. Radiographics. 2015;35 (2): 578-92.

More • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • The correct option is C coronary sinus and right atrium Coronary sinus drains the deoxygenated blood from the heart muscles to the right auricle. To prevent the backflow of blood from the right auricle to the coronary sinus, the opening of the coronary sinus is guarded by the Thebesian valve. So Thebesian valve is present between the coronary sinus and the right atrium. The opening of the inferior vena cava into the right atrium is guarded by a valve named Eustachian valve. The opening of the superior vena cava into the right atrium and pulmonary veins into the left atrium are not guarded by any valves. Q. Match the following Location val...

• 1 Atria • 1.1 Right Atrium • 1.2 Interatrial Septum • 1.3 Clinical Relevance: Atrial Septal Defect • 1.4 Left Atrium • 2 Ventricles • 2.1 Right Ventricle • 2.2 Interventricular Septum • 2.3 Left Ventricle • 3 Clinical Relevance: Tetralogy of Fallot The heart consists of four chambers – two atria and two ventricles: • Blood returning to the heart enters the atria, and is then pumped into the ventricles. • From the left ventricle, blood passes into the aorta and enters the systemic circulation. • From the right ventricle, blood enters the pulmonary circulation via the pulmonary arteries. In this article we shall look at the anatomy of the chambers of the heart – their location, internal structure and clinical correlations. Atria Right Atrium The right atrium receives deoxygenated blood from the superior and inferior vena cavae, and from the coronary veins. It pumps this blood through the right atrioventricular orifice (guarded by the tricuspid valve) into the right ventricle. In the anatomical position, the right atrium forms the right border of the heart. Extending from the antero-medial portion of the chamber is the right auricle (right atrial appendage) – a muscular pouch that acts to increase the capacity of the atrium. The interior surface of the right atrium can be divided into two parts, each with a distinct embryological origin. These two parts are separated by a muscular ridge called the crista terminalis: • Sinus venarum – located posterior to the crista terminal...

The Eustachian valve, also known as the "valve of the Radiographic features Incomplete regression of this structure results in a thickened ridge at the IVC/RA junction, which can occasionally be thick enough to mimic thrombus or a right Clinical importance A thickened eustachian valve may also interfere with placement of an • 1. Broderick LS, Brooks GN, Kuhlman JE. Anatomic pitfalls of the heart and pericardium. Radiographics. 2005;25 (2): 441-53. • 2. Kydd AC, McNab D, Calvert PA et-al. The eustachian ridge: not an innocent bystander. JACC Cardiovasc Imaging. 2014;7 (10): 1062-3. • 3. Yavuz T, Nazli C, Kinay O et-al. Giant eustachian valve with echocardiographic appearance of divided right atrium. Tex Heart Inst J. 2003;29 (4): 336-8. • skeleton of the abdomen and pelvis • • • • • • • • • • • • • • • • • • • muscles of the abdomen and pelvis • • • • • muscles • • • • • • • • • • • • • • • • • • • • • • • • • • spaces of the abdomen and pelvis • anterior abdominal wall • • posterior abdominal wall • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • abdominal and pelvic viscera • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • variants • • • • • • • • • • • • • • • • • • • ​ • • • • • • • • • • • • • • adrenal vessels • • • • variants • • • • • variants • • • • • variants • • • • • • • • • • • number • • • fusion • • • • • • location • • ...

1 An Introduction to the Human Body • Introduction • 1.1 Overview of Anatomy and Physiology • 1.2 Structural Organization of the Human Body • 1.3 Functions of Human Life • 1.4 Requirements for Human Life • 1.5 Homeostasis • 1.6 Anatomical Terminology • 1.7 Medical Imaging • Key Terms • Chapter Review • Interactive Link Questions • Review Questions • Critical Thinking Questions • 2 The Chemical Level of Organization • Introduction • 2.1 Elements and Atoms: The Building Blocks of Matter • 2.2 Chemical Bonds • 2.3 Chemical Reactions • 2.4 Inorganic Compounds Essential to Human Functioning • 2.5 Organic Compounds Essential to Human Functioning • Key Terms • Chapter Review • Interactive Link Questions • Review Questions • Critical Thinking Questions • 3 The Cellular Level of Organization • Introduction • 3.1 The Cell Membrane • 3.2 The Cytoplasm and Cellular Organelles • 3.3 The Nucleus and DNA Replication • 3.4 Protein Synthesis • 3.5 Cell Growth and Division • 3.6 Cellular Differentiation • Key Terms • Chapter Review • Interactive Link Questions • Review Questions • Critical Thinking Questions • 4 The Tissue Level of Organization • Introduction • 4.1 Types of Tissues • 4.2 Epithelial Tissue • 4.3 Connective Tissue Supports and Protects • 4.4 Muscle Tissue and Motion • 4.5 Nervous Tissue Mediates Perception and Response • 4.6 Tissue Injury and Aging • Key Terms • Chapter Review • Interactive Link Questions • Review Questions • Critical Thinking Questions • 5 The Integumentary ...

Together, your superior vena cava and inferior vena cava collect deoxygenated blood from your whole body and bring it back to your heart for new oxygen. This is why the vena cava veins are the largest veins in your body. Your upper body veins send blood to your superior vena cava and your lower body veins empty blood into your inferior vena cava. Overview Vena cava veins take blood back to the heart. What is the vena cava? The superior vena cava and inferior vena cava are very large veins that bring deoxygenated blood to your heart to get oxygen. Your inferior vena cava, your body’s largest vein, carries oxygen-depleted blood back to your heart from the lower part of your body (below your Think of it like a bus line. The downtown line is like the smaller veins from your lower body (such as veins from your kidneys, liver and lower back area) that bring deoxygenated blood into your inferior vena cava. Blood from those other veins gets on the inferior vena cava bus to go to your heart. Your uptown line (upper body) veins, such as the veins in your upper back and chest, take deoxygenated blood onto your superior vena cava bus for return to your heart. Your heart is the hub or destination where all the deoxygenated blood from the uptown and downtown bus lines (veins) goes. Anatomy Where is the vena cava located? Your inferior vena cava and superior vena cava are both on your heart’s right side. Your right and left innominate (or brachiocephalic) veins merge to form your superio...

Right Atrium Right Atrium The right atrium is the first chamber of the heart that the blood comes into contact with as it returns from the systemic circulation, and from the blood supply to the heart. The blood entering this chamber is deoxygenated. The main vessels entering the right atrium are the superior vena cava, and the inferior vena cava. These are the coronary sinus, which carries venous return from the coronary arteries (i.e. the blood supply to the heart). Finally, also entering the right atrium are the venae cordis minimae (tiny cardiac veins which open directly into the right atrium). There are two pouches which comprise the right atrium, the main cavity, and also a small chamber projecting to the left (lying on the anterior surface, and partly covering the root of the aorta) like an ear. This is the auricle. At the junction between the right atrium, and the right auricle, on the outside of the heart, is the sulcus terminalis (a shallow groove). On the inside of the atrium, this forms a ridge, the crista terminalis, which separates the main part of the atrium posteriorly (derived from the sinus venosus, and the anterior part (derived from the primitive atrium). This anterior part is marked by bundles of muscular fibres, the musculi pectinati. The coronary sinus opens into the right atrium between the inferior vena cava and the atrioventricular tricuspid valve. It is guarded by a rudimentary, non-functioning valve. The right atrium also contains some evidence o...

1 An Introduction to the Human Body • Introduction • 1.1 Overview of Anatomy and Physiology • 1.2 Structural Organization of the Human Body • 1.3 Functions of Human Life • 1.4 Requirements for Human Life • 1.5 Homeostasis • 1.6 Anatomical Terminology • 1.7 Medical Imaging • Key Terms • Chapter Review • Interactive Link Questions • Review Questions • Critical Thinking Questions • 2 The Chemical Level of Organization • Introduction • 2.1 Elements and Atoms: The Building Blocks of Matter • 2.2 Chemical Bonds • 2.3 Chemical Reactions • 2.4 Inorganic Compounds Essential to Human Functioning • 2.5 Organic Compounds Essential to Human Functioning • Key Terms • Chapter Review • Interactive Link Questions • Review Questions • Critical Thinking Questions • 3 The Cellular Level of Organization • Introduction • 3.1 The Cell Membrane • 3.2 The Cytoplasm and Cellular Organelles • 3.3 The Nucleus and DNA Replication • 3.4 Protein Synthesis • 3.5 Cell Growth and Division • 3.6 Cellular Differentiation • Key Terms • Chapter Review • Interactive Link Questions • Review Questions • Critical Thinking Questions • 4 The Tissue Level of Organization • Introduction • 4.1 Types of Tissues • 4.2 Epithelial Tissue • 4.3 Connective Tissue Supports and Protects • 4.4 Muscle Tissue and Motion • 4.5 Nervous Tissue Mediates Perception and Response • 4.6 Tissue Injury and Aging • Key Terms • Chapter Review • Interactive Link Questions • Review Questions • Critical Thinking Questions • 5 The Integumentary ...

The Eustachian valve, also known as the "valve of the Radiographic features Incomplete regression of this structure results in a thickened ridge at the IVC/RA junction, which can occasionally be thick enough to mimic thrombus or a right Clinical importance A thickened eustachian valve may also interfere with placement of an • 1. Broderick LS, Brooks GN, Kuhlman JE. Anatomic pitfalls of the heart and pericardium. Radiographics. 2005;25 (2): 441-53. • 2. Kydd AC, McNab D, Calvert PA et-al. The eustachian ridge: not an innocent bystander. JACC Cardiovasc Imaging. 2014;7 (10): 1062-3. • 3. Yavuz T, Nazli C, Kinay O et-al. Giant eustachian valve with echocardiographic appearance of divided right atrium. Tex Heart Inst J. 2003;29 (4): 336-8. • skeleton of the abdomen and pelvis • • • • • • • • • • • • • • • • • • • muscles of the abdomen and pelvis • • • • • muscles • • • • • • • • • • • • • • • • • • • • • • • • • • spaces of the abdomen and pelvis • anterior abdominal wall • • posterior abdominal wall • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • abdominal and pelvic viscera • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • variants • • • • • • • • • • • • • • • • • • • ​ • • • • • • • • • • • • • • adrenal vessels • • • • variants • • • • • variants • • • • • variants • • • • • • • • • • • number • • • fusion • • • • • • location • • ...

Together, your superior vena cava and inferior vena cava collect deoxygenated blood from your whole body and bring it back to your heart for new oxygen. This is why the vena cava veins are the largest veins in your body. Your upper body veins send blood to your superior vena cava and your lower body veins empty blood into your inferior vena cava. Overview Vena cava veins take blood back to the heart. What is the vena cava? The superior vena cava and inferior vena cava are very large veins that bring deoxygenated blood to your heart to get oxygen. Your inferior vena cava, your body’s largest vein, carries oxygen-depleted blood back to your heart from the lower part of your body (below your Think of it like a bus line. The downtown line is like the smaller veins from your lower body (such as veins from your kidneys, liver and lower back area) that bring deoxygenated blood into your inferior vena cava. Blood from those other veins gets on the inferior vena cava bus to go to your heart. Your uptown line (upper body) veins, such as the veins in your upper back and chest, take deoxygenated blood onto your superior vena cava bus for return to your heart. Your heart is the hub or destination where all the deoxygenated blood from the uptown and downtown bus lines (veins) goes. Anatomy Where is the vena cava located? Your inferior vena cava and superior vena cava are both on your heart’s right side. Your right and left innominate (or brachiocephalic) veins merge to form your superio...