Heart Flashcards
What does the cardiovascular system consist of ?
heart, blood and blood vessels
How many times des the heart beats?
100k times per day
How many times does the heart beat per lifetime?
2.9 Billion
How many circuits is the heart lined with the CV system ?
2 Main circuits
Carries blood to and from the lungs to the heart
Pulmonary Circuit
Transports blood to and through the body (heart to tissues and back to the heart
Systemic circuit
Arteries carry blood ?
Away from heart and towards tissues
Veins to heart
Away from tissue
Great Vessels
Largest veins and arteries
Capillaries
Smallest
How many chambers does the heart has? (cut half of the coronal plane)
4 chambers
Left atrium and Left ventricles
L- atrium collects blood from pulmonary circuit dumps into L- ventricle
R- atrium collects blood from __ and dumps into ___
systemic circuit; R- ventricle
What contracts first in the heart then what ?
The atria’s contract first, then ventricles.
What’s the outer muscle of the heart?
Epicardium ( Visceral pericardium)
What’s the middle muscle of the heart?
Myocardium - spiral bundles of muscles
What’s the inner muscle of the heart?
Endocardium ( simple squamous cells)
Outer _____ pericardium prevents overfilling. helps to protect
Fibrous
The heart is surrounded by ____ to protect it from friction ?
pericardial sac
Inner ____ pericardium
Serous
Outer parietal layer, inner visceral layer (epicardium)
Increases fluid in pericardial space when infected
Pericarditis
Deep groove on the border between atria/ventricles
Coronary Sulcus
Expandable extension of the atrium “ Ear-like”
Auricle
The posterior interventricular sulcus contains ?
Fat pads (stripped to see cardiac vessels)