Question

heartwood

Accepted Answer

درون چوبthe dense inner part of a tree trunk, yielding the hardest timber.In the inner heartwood , these bodies were rarefying and cell walls became impregnated by a brown colour.

Front	heartwood
Back	درون چوب the dense inner part of a tree trunk, yielding the hardest timber. In the inner heartwood , these bodies were rarefying and cell walls became impregnated by a brown colour.

Heartwood درون چوب Dense Part Tree Trunk Yielding