what is the right answer?

Question

1.The atrioventricular valve on the right side of the heart is the ?
2.Repolarisation of the ventricles is represented on an ECG by ?
3.The pacemaker of the heart is?
4.Cardiac output is the product of which 2 measurements?
5.The middle layer of the heart, composeed of mainly cardiac muscle, is called the?
6.De-oxygenated blood is carried away from the heart muscle by?
7.Follow the proper pattern of blood flow through the heart starting at the vena cava and finishing at the aorta?

Answer 1

1. the right is the tricuspid valve (the other one on the left is the mitral valve)
2. sorry, don't know number 2
3. the natural pacemaker is the Sinoatrial node
4. cardiac output = *heart rate* multiplied by *stroke volume*
5. there's three types of heart tissue, endo-/myo-/epi- cardium. the middle one is... you guessed it, the myocardium.
6. deoxygenated blood has to go FROM the heart TO the lungs so it can pick up more oxygen. it does this by means of the PULMONARY ARTERY. this is the only artery that will carry deoxygenated blood. Remember: Arteries>Away from heart

7. deoxygenated blood is coming from the body to the right side of the heart via the vena cava (superior and inferior). it enters the right atrium, passes through the tricuspid valve to get into the right ventricle, then through the pulmonary valve to the pulmonary artery and towards the lungs (part of the pulmonary system). it is delivered to capillaries surrounding alveoli in the lungs where it picks up oxygen and gets rid of CO2 waste. once oxygenated at the alveoli, it travels back to the heart via pulmonary veins. it enters the left atrium, passes through the mitral valve to get into the left ventricle, through the aortic valve and then to the aorta where oxygenated blood will exhange oxygen with CO2 in tissues throughout the body. it thus becomes deoxygenated, veins combine to form vena cavae, and enter the heart to become oxygenated once more!

Answer 2

1. tricuspid valve
2. choose between this:letters-pqrst waves-p waves q waves qrst waves
3. sa node - sinoatrial node
4. heart rate and...?
5. septum.interventricular septum
6. pulmonary artery
7. from the vena cava(superior and inferior)>r. atrium>tricuspid valve>r.ventricle>semilunar pulmonary vave>pulomonary artery>lungs(capillaries air sacs)> pulmonary vein> L. atrium>bicuspid valve(mitral valve)>atrioventricular valve>atrium
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Answer 3

1) Tricuspid valve
2) T-wave
3) Sinus node
4) CO = Stroke volume x Heart rate
5) myocardium
6) Pulmonary artery
7) Vena cava to right atrium to right ventricle to pulmonary artery to lungs to pulmonary veins to left atrium to left ventricle to aorta

Answer 4

6 Coronary sinus.
Other answers are already given by our friends .