For example, vacuoles in stomata cells contain large numbers of potassium ions, which can be pumped in or out to open or close the stomata. Animal Cells In animal cells, vacuoles serve more subordinate roles, such as assisting in endo- and exocytosis or basic storage of food and waste. Central Vacuole The central vacuole is found only in plant cells. It is filled with water and is pressurised, like a balloon. This forces all the other organelles within the cell out toward the cell wall. This pressure is called turgor pressure and is what gives plants their crisp and firm structure.
A nasogastric (NG) tube is a long, narrow feeding tube that goes through your nose and down into your stomach. The NG tube is soft and bendable. (See the diagram) When you leave the hospital, you should be able to: Give yourself liquid food and water through the feeding tube. Give yourself medication through the tube.
Many of these lesions recur and the artery has another obstruction within a short period. This occurs in 40 percent of angioplasties within six months after PTCA. A stent is a short hollow tube. It is placed in the artery at the site of the former blockage. It holds the artery open. Initially, bare metal stents were used. Compared with no stents, re-obstruction rates at six months after angioplasty were cut in half, to 20 percent, and few re-obstructions were seen more than a year after treatment. Drug eluting stents, or DES, were developed to try to further reduce the rate of re-obstruction. These stents are metal with a polymer coating and a drug, either sirolimus or paclitaxel, mixed into the polymer. The drug is delivered to the area of the opened artery over a period of up to a year.