lecture 2 different blood vessels

The exercise was created 2024-03-18 by feliciajonsssson. Question count: 27.

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  • the pulmonary circulation begin from the right ventricle which pushes oxygen poor blood into the pulmonary trunk
  • after oxygenation in the lungs the blood returns to the heart via pulmonary vein it reaches the left atrium and gets pushed down into the left ventricle
  • the systemic regulation begins from the left ventricle
  • in the systemic regulation, blood is ejected into the aorta
  • via arteries the blood reaches the organs and tissues where gas exchange take place
  • after gas exchange the blood returns to the heart and via vena cava it enters right atrium and then right ventricle
  • the first part of the circulatory system is the heart which pumps blood from low pressure regions (veins) to high pressure regions (arteries)
  • compression chambers are elastic type artiers
  • elastic arteries consist of elastic membranes which expand during ejection
  • during diastole the elasticity of the walls, allows for regain of its initial diameter
  • 2 examples of elastic type arteries are aorta and pulmonary trunk
  • aorta and pulmonary trunk are elastic type arteries, arteries further from the heart are muscle type arteries which can generate resistance because of smooth muscle cells
  • atherosclerosis leads to high pressure during systole
  • athersoclerosis leads to very low pressure during diastole
  • resistance vessels are muscle type arteries
  • arteries and arterioles are resistance vessels which consist of smooth muscle cells
  • precapillary sphincters are the last smooth muscle cells before capillareies
  • in case if a tissue is in working state, the precapillary sphcinters are open
  • in case of non-working tissues, the precapillary sphincters are closed
  • exchange vessels are capillaries
  • depot vessels are veins and venules
  • veins have a very compliant wall which makes them good at "store" blood
  • arteriovenous anastomosis is an example of shunt blood vessel
  • functions of arteriovenous anastomosis is that it increase venous return because it provides a faster route for the blood
  • arteriovenous anastomisis let larger blood vessels such as leukocytes pass through to the veins
  • resorptive blood vessels are lymph vessels
  • lymph vessels carries interstitial fluid bakc to the veins

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