Heart info

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What the heart wall layers from superficial to deep?
- Epicardium- visceral paricardium epi+ loose connective tissue + adipose cells
- Myocardium-cardiac muscsle tissue arranged in bundles
- Endocardium- simple squamous epithelium layer & loose connective tissue lining inside of heart and forming valves
What are the 3 heart tissue layers?
- Fibrous pericardium
- Parietal pericardium
- Visceral pericardium
What is the fibrous pericardium?
What does the fibrous pericardium do?
- Outer layer
- (1) dense irregular connective tissue
- (2) sticks to the diaphragm inferiorly
- (3) fuses with roots of ‘great vessels’ superiorly
- (4) stabilizes the position of the heart
What makes up the serous pericardium (membrane)?
(1) outer, parietal layer (parietal pericardium), is continuous with
- (2) inner, visceral layer (visceral pericardium), covers the heart surface; also called epicardium
- (3) between the two layers is a potential space called the pericardial cavity; the cavity contains a little serous fluid to prevent friction as the heart moves
What is pericarditis?

inflammation of pericardium
What defines capillaries?
- Capillaries
- have the smallest diameter
- gas & nutrient exchange occur here
- on the arterial side contain oxygenated blood
- on the venous side contain deoxygenated blood
What defines veins?
- carry blood back to the heart
- tend to have large diameters
- walls are not as muscular as arteries
- lower pressure than arteries
- blood may be oxygenated (pulmonary veins or pulmonary circuit) or not (systemic circuit, superior or inferior vena cave)
What seperates the upper chambers of the heart?

Interatrial septum
What seperates the lower chambers of the heart?

Interventricular septum
What is the anterior external landmark separating the ventricles?

anterior interventricular sulcus
What is the posterior external landmark separating the ventricles?

posterior interventricular sulcus
What is the external landmark separating the atria from ventricles?

coronary sulcus or atrioventricular sulcus
Where does the right atrium receive blood from?
- coronary sinus
- inferior vena cava
- superior vena cava
Where does the right ventricle receive blood?

from the right atrium through the tricuspid valve
Blood leaves the right ventricle through which valve?

Pulmonary semilunar valve
Left atrium receives blood from where?
- right pulmonary vein
- left pulmonary vein
Blood leaves the left atrium through this valve?

bicuspid or mitril valve
What is unique about the left ventricle?

thickest myocardium
Blood leaves the left atrium through this valve?

Aortic semilunar valve
What are the 2 functions of the valves in the heart?
- pushed open by pressure
- prevent back flow
What were some of the valve disorders discussed in class?
- Valve prolapse
- Stenosis
- Heart murmur
What are the great vessels of the right heart?
- Superior & Inferior Vena Cava
- Pulmonary Trunk that is divided into the left and right pulmonary arteries
What are the great vessels of the left heart?
- 4 Pulmonary Veins
- Ascending Aorta
What are the first branches off of the aorta?
- Right Coronary artery
- anterior interventricular artery
- circumflex artery
- Left Coronary artery
- marginal artery
- posterior interventricular artery

Author

cinlou333

183909

Card Set

Heart info

Description

Study guide for Test 3

Updated

2012-11-16T01:52:38Z

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