Differentiation of the xylem progresses outwards, of the phloem inwards, but the two tissues never meet in the centre.
It is generally convenient to keep the inwards and the outwards traffic distinct and to deal with the two classes separately; at junction stations it may also be necessary to provide for the transfer of freight from one wagon to another, though the bulk of goods traffic is conveyed through to its destination in the wagons into which it was originally loaded.
The feeling of heat is at first an internal one, but it spreads outwards to the surface and to the extremities; the skin becomes warm and red, but remains dry; the pulse becomes softer and more full, but still quick; and the throbbings occur in exposed arteries, such as the temporal.
To S.S.E., ridges radiate outwards, separated by broad valleys, ending upwards in vast cirques.
In a southerly direction, which, spreading outwards as they go south, reach the sea at various points in Cochin- Indo- China, the Malay peninsula, and the east flank of Bengal.