During the 7th century the power of the Eastern Roman (Byzantine) Empire was challenged by the Sassanids of Persia, who invaded Egypt in 616. They were expelled again in 628, but soon after, in 642, the country fell to the Arabs, who brought with them a new religion, Islam, and began a new chapter of Egyptian history.
the bark protcts the zylem and the phloem fron infection.bark is like our skin and if we cut off some of it and didnt keep it clean it would become infected.you could shave off a couple of inches and a tree may live depending on its age but if its a sapling and about 3 to 5 inches in diameter it would die eventually.
A tree typically has many secondary branches supported clear of the ground by the trunk. This trunk typically contains woody tissue for strength, and vascular tissue to carry materials from one part of the tree to another.For most trees it is surrounded by a layer of bark which serves as a protective barrier. commonly applied narrower definition is that a tree has a woody trunk formed by secondary growth, meaning that the trunk thickens each year by growing outwards, in addition to the primary upwards growth from the growing tip.