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Branch attachment in common ash Fraxinus excelsior L. Figure 1: Anatomical drawing of the wood grain of a branch attachment in a tree. Initially branches are mechanically attached to the trunks of trees by forming interlocking wood grain patterns at the top of the joint, within what is known as 'axillary wood' (Fig. 1). [1]
The World Tree is often identified with the Tree of Life, [4] and also fulfills the role of an axis mundi, that is, a centre or axis of the world. [5] [3] It is also located at the center of the world and represents order and harmony of the cosmos. [6]
The tree of life connects the upper world, middle world and underworld. It is also imagined as the "white creator lord" (yryn-al-tojon), [50] thus synonymous with the creator deity, giving rise to different worlds. The world tree or tree of life is an important symbol in Turkic mythology. [51] It is a common motif in carpets.
If wood begins to rot it could create a weak branch connection between the developing suckers and the main tree leading to a possible branch failure. If a tree is unable to compartmentalize the fungi, it may reach the trunk and ultimately kill the tree. [4] Aesthetics is another reason why people hire arborists to top their trees.
A branch collar is the "shoulder" between the branch and trunk of woody plants; the inflammation formed at the base of the branch is caused by annually overlapping trunk tissue. [1] The shape of the branch collar is due to two separate growth patterns, initially the branch grows basipetally, followed by seasonal trunk growth which envelops the ...
Trunks allow air to travel in, which enables scent molecules to travel up the trunk and reach specialized cells. These specialized olfactory cells allow elephants to pick up on even the tiniest of ...
Forces may include wind, fire, heat, lightning, rain, attack from insects (such as ants or beetles), bacteria, or fungi. Also, trees may self-prune, dropping lower branches as they reach maturity, exposing the area where the branch was attached. Many animals further develop the hollows using instruments such as their beak, teeth or claws. [1] [3]
Trees have their roots in the ground and their trunk and branches extended towards the sky. This concept is found in many of the world's religions as a tree which links the underworld and the earth and holds up the heavens. In Norse mythology, Yggdrasil is a central cosmic tree whose roots and branches extend to various worlds.