Pretend you are a red blood cell
• Explain in words your way through the cardiovascular system starting at the superior vena cava, delivering oxygen to the brain, and then returning to the vena cava.
• Make sure to list the important veins, arteries, atria, ventricles, valves, etc. that you will come in contact with as you make your journey.
Please help me.
Answers
Answer:
So here you go:-
Explanation:
Ok..fasten your seat belt, this is a bumpy journey.
Entering the right atrium from the vena cava, we are sent to the right ventricle through the tricuspid valve, where we are forcibly pumped out through the pulmonary semilunar valve to the pulmonary artery, which immediately branches into left or right pulmonary artery depending on which lung we go to. From there, the pulmonary artery bifurcates into smaller pulmonary arteries, to arterioles, and finally to capillaries. We now find ourselves moving in single file in a capillary which is next to an alevolus, or an air sac in the lung. We give off CO2 by diffusion to the alveolus (capillaries and alveolar walls are only one cell thick), and we then take on O2 from the aleveolus, which bonds to our hemoglobin molecules. Then we are pushed along to venules, then larger veins, then to the left or right pulmonary vein (depending on which lung we were in), where we are sucked into the left atrium of the heart. (NOTE: the pulmonary system is the only one where deoxygenated blood is carried in arteries and oxygenated blood is returned to the heart in veins).
From the left atrium, we are sent forcibly through the bicuspid valve to the left ventricle of the heart, where we are pumped very forcibly out of the heart through the aortic semilunar valve to the aorta, then to the ascending aorta which bifurcates into the carotid artery (left or right, depending on which path we took). The carotid artery goes directly to the brain, bifurcating into cerebral arteries, arterioles, capillaries, where we give off our O2 to whichever part of the brain we've gone to and taking up CO2 from the brain cells. Then the capillary becomes a venule which becomes a cerebral vein, and finally opens to the left or right jugular vein. From there, we enter the superior vena cava which blends with the inferior vena cava to form the vena cava, and we're sucked back into the right atrium of the heart again to begin our journey yet again.
PLEAAAAAASEEEEE MARK AS THE BRAINIEST ANSWER.