1 ) , the stenosis was classified according to the Stanford classification [ 7 ] system into 4 types : ( i ) type I describes a partial obstruction of the SVC ( up to 90 % ) with remaining patency and antegrade perfusion of the azygos vein ; ( ii ) type II shows increasing obstruction ( 90-100 % ) ; ( iii ) type III is complete obstruction with ...
The tulip tree is a deciduous tree with a moderate to rapid growth rate. It has a tendency to produce a strong central leader that forms a tall, straight trunk. When young, this tree tends to have a canopy with an upright pyramidal growth habit, As it ages, the tree becomes columnar or more spreading and open.
Tennessee's State Tree. When it adopted the tulip poplar as the state tree in 1947, Tennessee's legislature cited the speciesâ role in local history. Tennessee's first settlers used the wood of the tulip poplar for building purposes. The tree's name is a reference to its green and orange flowers, which resemble tulips. Tennessee's Three State Flowers