Outermost Portion of the Wood is Known as

The outermost portion of the wood is known as bark.

Solution

Pith (medulla) - It is the innermost central portion or core of the tree.

Heartwood - These are the outer annular rings surrounding the pith.

Sapwood - These are the outer annular rings in between the heartwood and cambium layer.

Cambium - It is a thin layer of sap in between the sapwood and inner bark.

Medullary rays - These are the thin radial fibres, extending from the pith up to the cambium layer holding the annular rings of the heartwood and sapwood in position.

Bark - The outermost portion of the wood is known as bark. It is the outer protective layer around the cambium layer.

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