More Cvs Topic 1 Flashcards
Explain the layers of heart
Fibrous pericardium (prevent overexpanaion)
Parietal serous pericardium
Pericardial fluid cavity (frictionless)
Visceral/ epicardium
Myocardium
Endocardium
What is the endocardium
Connective tissue and epithelial layer which is continuous with the blood vessel endothelial layer
Why is the pulmonary circulation low pressure
High pressure would force tissue fluid out of blood at pulmonary capillaries causing drowning
Can diastole and systole be used for atria too
Yes
What separates ventricles and atria
Interatrial septum
Interventricular septum
What cusps of the tricuspid valve are there
Anterior cusp
Posterior cusp
Septal cusp(side near the septum)
What attaches to papillary muscles eg the septal papillary muscles of the heart to the cusps
Chordae tendineae
What is the mitral valve divided into
Anterior and posterior cusps
Attached to anterior and posterior papillary muscles
At the start of diastole, what fills in aorta valves to stop back flow
Aortic sinuses (spaces between the 3 cusps)
What is the crus
Point on the external heart where all 4 chambers meet eg next to coronary sinus
What are the grooves called
Have anterior interventricular groove (great cardiac vein and left coronary artery/ interventricular artery)
Posterior interventrcilar groove (middle cardiac vein and posterior iv artery/branch of right coronary)
Coronary groove next to coronary sinus and also on anterior right side of the heart with right coronary artery,cardiac vein, small cardiac vein, marginal artery
Where is the base of heart
Situated on posterior aspect facing t6-T9 bodies and mostly left atrium but some right
During systole what do papillary muscles do
Contract and prevent valves inverting in high pressure as chamber contracts
What is another word for base
The posterior of heart from the atria/pulmonary trunk down to the interventricular groove
