Circulatory System Flashcards
Top and bottom numbers in blood pressure
systolic (top) and diastolic (bot)
Why does the heart make noise
the valves are closing
Order blood pressure in veins, arteries, and capillaries from highest to lowest
Arteries, Capillaries, Veins
Where is waste highest?
Just before the kidneys (renal artery)
where is there the least amount of waste
just after the kidneys (renal veins)
How many layers do arteries have
three
Which node begins the heartbeat?
SA node
what muscle is in blood vessels?
smooth muscle
How does blood remove heat?
Dilates and pushes blood closer to the surface so it can cool
What is the gap in a fetus’s heart chambers
oval opening
What controls heart rate?
Medulla Oblongata
What causes the ventricles to beat?
Purkinje fibres
What does the AV node use to send the signals to the Purkinje fibres?
AV bundle
First bump in ECG heartbeat
Atrial Systole
Large spike on ECG
ORS wave, ventricular systole (Contracting)
Last bump on ECG
Atrial/ventricular diastole (Relaxing)
What device measures blood pressure and spelling
Sphygmomanometer
What is the normal heart rate?
60 - 100 bpm
What is Urea?
Waste product cleaned out of blood by kidneys
What side of the heart pumps oxygenated blood?
Left
What side of the heart pumps deoxygenated blood?
Right
What artery pumps blood to the lungs?
Pulmonary
What direction do arteries pump?
Away from the heart
What direction do veins pump?
To the heart
