You can also see that the villus has a network of capillaries, which are very tiny blood vessels. The villus also has another type of tiny vessel known as a lacteal, which fills with milky white fluid known as chyle after a fatty meal.
Capillaries are very thin and fragile they are actually only one epithelial cell thick... displayed 300 characters
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They are so thin that blood cells can only pass through them in single file. The exchange of oxygen and carbon dioxide takes place through the thin capillary wall. The red blood cells inside the capillary release their oxygen which passes through the wall and into the surrounding tissue. The tissue releases its waste products, like carbon dioxide, which passes through the wall and into the red blood cells... displayed next 300 characters
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Karyotyping may be done on a sample of bone marrow. For more information, see the medical test Bone Marrow Aspiration and Biopsy...
Capillaries connect arteries to veins.
The right and left halves of the heart act as separate pumps and there is no mix of blood between them. Each half is responsible for pumping blood through one of two blood vessel circuits: the pulmonary circuit and the systemic circuit...
Even with the technological advances
made through out the years, the fatality rate of amniocentesis during the early stages of
pregnancy was 2.3%, and therefore it was not a generally accepted practice (Woo, 2006)...
Over a period of time, this additional pressure of blood causes the veins to stretch, bulge and become visible. At the same time, tiny capillary branches of the veins are also overfilled with blood, producing multiple spider veins and purple discoloration...
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