Cardio 1 Flashcards
Where is the heart located (specifically) within the chest cavity?
Mediastinum
Mediastinum =
- area above the diaphragm
- between lungs
What are the components of the heart wall?
- pericardium
- myocardium
- endocardium
Pericardium
- double-walled sack
- 2 layers
What are the two layers of the pericardium?
- parietal (outer)
- visceral (inner)
What separates the parietal and visceral layers of the pericardium?
- pericardial cavity
- fluid
Myocardium =
- thickest layer of the heart wall
- made of cardiac muscle
Endocardium =
- internal lining of heart
- connective tissue and squamous cells
Pulmonary circulation occurs in the (R/L) heart
Right
Systemic circulation occurs in the (R/L) heart
Left
Pulmonary circulation pumps blood through
Lungs
Systemic circulation pumps blood through
Entire body
What are the types of valves in the heart?
- atrioventricular valves
- semilunar valves
What are the atrioventricular valves?
- tricuspid
- mitral
Tricuspid valve
- R AV
- 3 cusps (flaps)
Mitral valve
- L AV
- bicuspid
What are the semilunar valves?
- pulmonic
- aortic
Pulmonic valve: where does it pump from/to?
RV » pulmonary artery (trunk)
Aortic valve: where does it pump from/to?
LV » aorta
What are the great vessels of the heart?
- superior/inferior vena cavae
- pulmonary artery (trunk)
- pulmonary veins
- aorta
Superior/inferior vena cavae: function
Blood return to the heart
Pulmonary artery function
- takes deoxygenated blood from heart to lungs
- right and left pulmonary arteries
Pulmonary veins: function
Return oxygenated blood to heart
Aorta: function
Pumps from LV to body
What are the coronary vessels?
- Right coronary artery
- Left coronary artery
- Collateral arteries
- Coronary capillaries
- Coronary veins
- Coronary lymphatic vessels
The right coronary artery splints into the
- conus
- right marginal branch
- posterior descending branch
The left coronary artery splits into the
- left anterior descending artery
- circumflex artery
Which of the coronary vessels is known as the widowmaker?
Left anterior descending artery (LAD)
What do coronary capillaries do?
- exchange O2 and nutrients
- feeds into veins
Coronary veins deal with
Circulation within the heart itself, not peripheral circulation
What are the coronary veins?
- coronary sinus
- great cardiac vein
- posterior vein of the left ventricle
Coronary lymphatic vessels: where do they drain?
» Mediastinal lymph nodes
»» Superior vena cava
