4. Fill in the blanks. After being depleted of oxygen on its pass through the bo

Question

4. Fill in the blanks. After being depleted of oxygen on its pass through the body C the blood returns via the After passing through the morara circuit) atrium. and starts to fill the valve, the blood then enters the ventricle. Once this ventricle fills, the electrical stimulation of the muscle layer of the heart, the layer, will force this region of the heart to h pressure arises from the contraction of the ventricles, the valve will open, and blood will leave the heart via the where it will and travel to the circuit). and enters into the gain oxygen (the The blood returns from the lungs via the atrium. From there the blood will pass through the valve into theventricle. valve into the From there, the blood will pass through the From this major vessel, the blood will pass into smaller vessels called then Gas exchange will occur in the smallest vessels called From these, blood will enter into then and finally return to the heart. Word List right right left tricuspid mitral (bicuspid) pulmonary semilunar aortic semilunar systemic pulmonary vena cava aorta veins left arterioles myocardium pulmonary vein venules capillaries lungs pulmonary artery

Explanation / Answer

After being depleted of oxygen on its pass through the body (the systemic circuit) the blood returns via the vena cava and starts filling the right atrium. after passing through the mitral (bicuspid) valve, the blood then enters the right ventricle. once this ventricle fills, the electrical stimulation of the muscle layers of the heart, the myocardium layer will force this region of the heart to contract. when enough pressure arises from the contraction of the ventricles, the pulmonary semilunar valve will open, and the blood will leave the heart via the pulmonary artery and travel to the lungs where it will gain oxygen ( the pulmonary circuit ). the blood returns from the lungs via the pulmonary vein and enters into the left atrium. From there the blood will pass through the tricuspid valve into the left ventricle. From there the blood will pass through the aortic semilunar valve into the aorta. From this major vessel, the blood will pass into smaller vessels called arteries then arterioles. gas exchange will occur in the smallest vessels called capillaries. from these, the blood will enter into venules, then veins and finally return to the heart.

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