Mathematica can be used to increase the precision of your measurements of the time delays. called sound analysis.nb shows examples using some of the commands below. You should save your les as .wav les from audacity, using Export. microphones. supplied equipment. a value for the speed of sound in air.
exists and is an alternate of . Making the world better, one answer at a time. After blood clots, the fluid that remains is referred to as serum. Plasma is the fluid portion of the blood before clotting or in the presence of an anticoagulant. SerumAfter blood clots, the fluid that remains is referred to as serum.
Fetal blood is returned from the placenta to the fetus by the umbilical vein. This vein enters the fetal abdomen at the umbilicus and passes cephalad to the posteroinferior surface of the liver as the sinus venosus where it drains into the left portal vein (Fig. 1).After birth, the blood in the umbilical vein clots.Between the second and fifth postnatal days, the umbilical vein is usually completely occluded. After obliteration over the next several months, the umbilical vein becomes the ligamentum teres hepatis, which usually measures between 10 and 20 cm (Fig. 2).BJECTIVE. The objective of our study was to describe the appearance of the remnants of the fetal circulation in adults on MDCT. CONCLUSION. The use of MDCT allows frequent visualization of the remnants of the umbilical vein, ductus venosus, foramen ovale, ductus arteriosus, and umbilical arteries.