Anatomy 2 lab Guide
Chapter 16 Notes
The heart lies in the mediastinum and is surrounded by a doubled layered membrane called the pericardium. The outer most layer of the pericardium is called the fibrous pericardium, which anchors the heart to surrounding structures. The inner layer is called the serous pericardium and is composed of two layers. The outer portion is called the parietal pericardium, the inner portion is called the visceral pericardium (epicardium).
Epicardium- outer most layer of the heart wall Myocardium- The actual muscle of the heart.
Endocardium- innermost layer of the heart.
The heart consists of four hollow chambers two atria that receive blood from the body’s veins. And two ventricles that pump blood into the body’s arteries. There is a thin wall between the atria’s that is called the interatrial septum. There is a wall between the ventricles called interventricular septum.
Right Atrium- This is the superior right chamber. It receives deoxygenated blood from the main veins, the superior and inferior vena cava and the coronary sinus. (These veins drain a series of blood vessels called the systemic circuit in which gases and nutrients are exchanged between the blood and the tissue cells)
Right Ventricle- Inferior to the right atrium and it receives deoxygenated blood and ejects it into the pulmonary trunk or pulmonary artery. (Pulmonary trunk branches into right and left pulmonary arteries, which deliver deoxygenated blood to the lungs through a series of vessels called the pulmonary circuit). This is where the blood becomes oxygenated.
Left Atrium- Superior left chamber that receives oxygenated blood returning from the pulmonary circuit through the pulmonary veins (exception).
Left Ventricle- receives oxygenated blood from the left atrium and pumps it into the largest artery in the systemic circuit called the aorta. The aorta then branches off to deliver the oxygenated blood to the body’s cells.
The left ventricle is much thicker than the right
The heart lies in the mediastinum and is surrounded by a doubled layered membrane called the pericardium. The outer most layer of the pericardium is called the fibrous pericardium, which anchors the heart to surrounding structures. The inner layer is called the serous pericardium and is composed of two layers. The outer portion is called the parietal pericardium, the inner portion is called the visceral pericardium (epicardium).
Epicardium- outer most layer of the heart wall Myocardium- The actual muscle of the heart.
Endocardium- innermost layer of the heart.
The heart consists of four hollow chambers two atria that receive blood from the body’s veins. And two ventricles that pump blood into the body’s arteries. There is a thin wall between the atria’s that is called the interatrial septum. There is a wall between the ventricles called interventricular septum.
Right Atrium- This is the superior right chamber. It receives deoxygenated blood from the main veins, the superior and inferior vena cava and the coronary sinus. (These veins drain a series of blood vessels called the systemic circuit in which gases and nutrients are exchanged between the blood and the tissue cells)
Right Ventricle- Inferior to the right atrium and it receives deoxygenated blood and ejects it into the pulmonary trunk or pulmonary artery. (Pulmonary trunk branches into right and left pulmonary arteries, which deliver deoxygenated blood to the lungs through a series of vessels called the pulmonary circuit). This is where the blood becomes oxygenated.
Left Atrium- Superior left chamber that receives oxygenated blood returning from the pulmonary circuit through the pulmonary veins (exception).
Left Ventricle- receives oxygenated blood from the left atrium and pumps it into the largest artery in the systemic circuit called the aorta. The aorta then branches off to deliver the oxygenated blood to the body’s cells.
The left ventricle is much thicker than the right