Flash cards on cardiovascular system

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offintowonderland
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Key revision points on the cardiovascular system

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Question Answer
Identify the key functions of blood - Carries substances e.g. Oxygen/ CO2/ nutrients/ waste / water - Defends against infection through Leukocyctes - Maintainance of the heart (homeostasis) - Protection through injury via platelets
List the different types of blood cells Ethrocyctes (white cells) Thrombocyctes (platelets) Leukocyctes (white cells)
Identify 4 main types of blood vessels Arteries Veins Capillaries Heart
Identify the function of atria The top 2 chambers in the heart which recieve deoxygenated blood (right) and oxygenated (left) blood
Identify the function of ventricles The bottom 2 chambers of the heart that recieves blood from atria. Ventricles push blood up into aorta and pulmonary artery
Identify the function of valves To prevent backflow from happening and to allow blood to move through different areas e.g. atrium to ventricle
Describe approx. size of heart Approx the size of a fist
Identify the 3 layers of the heart Pericardium Myocardium Endocardium
Describe 3 layers of heart Pericardium - Outer layer protecting the heart & provides lubrication Myocardium - Middle layer. Repsonsible for pumping the blood Endocardium - Lines the internal surface of valves & chambers
Identify the pulmonary circuit Takes deoxygenated blood from the body to the heart entering via right atrium & sending blood to lungs for gaseous exchange (Uses right side of body)
Identify systematic circuit Responsible for pumping oxygenated blood around the body to the organs & tissues (Uses left side of body)
Identify how the heart muscle is supplied with oxygen and nutrients The arteries
Why is the heart muscle on the left thicker? As it works at a higher pressure due to having a further distance around the body
Identify the types of waves on a ECG P wave QRS wave T wave
Identify the functions of the waves of an ECG P wave - Impulse from SA node to AV node QRS - Depolarisation of the ventricles, electrical activities of the purkinje fibres T wave - Repolarisation of the ventricles, the ventricles going into diastole & then relax
The heart is regulated by which centre? The cardiovascular system
Describe internal respiration The diffusion or gaseous exchange in which happens when the CO2 is rempved from the capillaries into the lungs where it will be removed via exhaling.
Describe short-term BP Checking the BP at that current moment in time via machine or manually. This can be repeated over a number hours however the reading will be from that moment in time.
Describe long-term BP Monitoring the BP over a long period of time e.g. days. This happens via a machine that is connected and measure the BP at regular intervals to gain an understanding of the overall BP.
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