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how does you heart utilize preassure gradients to circulate blood?
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- what circulatory System loops between the heart and the lungs?Occasionally an ectopic pacemaker will develop in part of the conducting system of the heart. What happens to heart rate if an ectopic pacemaker depolarizes at a rate of 120 times per minute?What type of blood is found in the perch heart? Oxygenated or deoxygenated or both? How does your answer to #1 correlate with the number of heart chambers found in the perch?
- Valves between which structures of the heart shown in the figure control the direction of the movement of oxygenated blood within the heart and as it is pumped to the systemic circuit?Draw the pressure changes along the systemic and pulmonaryvascular systems during the cardiac cycle?What anatomical feature prevents the electrical signal from traveling directly from atrial muscle to ventricular muscle?
- What type of tissue composes the fibrous skeleton of the heart, and how is it organized?What is the relationship between wall thickness and function among the various chambers of the heart?How does the depolarization of pacemaker cells differfrom the depolarization of other cardiac cells? What is thepacemaker potential?