Can you explain complex permanent tissues
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Complex tissues are made of more than one type of cells . All these cells coordinate to perform a common function . Xylem and phloem are examples of such comples tissues . They r both conducting tissues and constitute a vascular bundle. Vascular or conductive tissue is a distinctive feature of the complex plants , one that has made possible their survival in the terrestial environment.
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✔✔Tissues composed of more than one type of cells are called complex permanent tissues. There are two types of complex permanent tissues:-
⭕Xylem - Xylem is a vascular and mechanical tissue. it is composed of four different types of cells:- Tracheids, Vessels, Xylem parenchyma, Xylem sclerenchyma.
The cells have thick walls and many of them are dead cells. Tracheids and vessels are tubular structure. This allows them to transport water and Minerals vertically. The parenchyma stores food and helps in sideways conduction of water.
⭕Phloem - Phloem is made up of four types of elements:- Sieve tubes, Companion cells, Phloem Parenchyma and Phloem fibres. Except from phloem fibres phloem cells are living cells. Sieve tubes are tubular cells with perforated by numerous pores and are called sieve plates. Phloem transports food leaves to other plants of the plant.
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