Heart and Circulation Flashcards
Systemic circulation
Delivers blood rich in oxygen from left side of heart to body tissues returns blood low in oxygen to the right side of the heart
High pressure system
Pulmonary circulation
Delivers blood low in oxygen from right side of heart to the lungs
Returns blood rich in oxygen to the left side of the heart
Low pressure systems
Blood travels
Away from heart in the arteries and returns to the heart in the veins
P wave
Depolarisation of the atria
QRS complex
Depolarisation of the ventricles
T wave
Re polarisation of the ventricles
Capillaries are the site of
Gaseous, nutrient and waste exchange
Venules
Collect blood from the capillary beds and divert it to small veins
Lymphatic capillaries
Are blind end tubes that are located adjacent to capillary beds
Lymphatic flow…
Lymph capillaries-lymph vessels-lymph nodes-lymph trunks-thoracic duct or right lymphatic duct
Fibrous pericardium prevents
Overfilling. In elastic sac of dense connective tissue that wraps around the heart
Serous pericardium prevents
Friction. Two layers parietal and visceral-separated by pericardial cavity which contains serous fluid
Av valves (left-tricuspid and right-mitral or bicuspid)
Prevent backflow of blood into the atria
Semilunar valves have no chordae tendinae and prevent
Backflow of blood into the ventricles
