Предмет: Биология, автор: Kuznechov

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Автор ответа: cocickaVazanka

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Объяснение:

Строение древесной коры связано с образованием ее тканей из двух вторичных меристем — камбия и пробкового камбия

Камбий происходит из прокамбия — родоначальной ткани сосудистых пучков, в свою очередь возникающей из клеток первичной образовательной ткани, первоткани, или иначе первичной меристемы.

В основном древесина состоит из холоцеллюлозы — около 70 % и лигнина — смесь полимеров родственного строения ароматической природы, не менее 20 %. В холоцеллюлозы входят гемицеллюлозы и целлюлоза, не менее 40 %.

Сердцевина - это основная ткань - паренхима.

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