The cells pf which tissue differentiate to formdiff types of permanent tossue
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Theloeare 2 type of permanent tissue
• simple permanent -parenchyma ,collenchyma sclerenchyma
•complex permanent -xylem,phloem
me chloroplast to carry on photosynthesis. It is generally situated below the epidermis.
(iii) Sclerenchyma:
Cells are long, thick-walled and lignified with tapering ends. These are fibre like in appearance and also known as sclerenchymatous fibre. These are dead cells and perform mechanical function.
II. Complex Tissues:
(i) Xylem:
Structurally, xylem consists of both living and nonliving cells. Xylem consist of four elements: tracheids, vessels, xylem fibers and xylem parenchyma (Fig. 3.3).
(ii)Phloem
Phloem consists of four types of elements – sieve tubes, companion cells, and phloem parenchyma and phloem fibers
• simple permanent -parenchyma ,collenchyma sclerenchyma
•complex permanent -xylem,phloem
me chloroplast to carry on photosynthesis. It is generally situated below the epidermis.
(iii) Sclerenchyma:
Cells are long, thick-walled and lignified with tapering ends. These are fibre like in appearance and also known as sclerenchymatous fibre. These are dead cells and perform mechanical function.
II. Complex Tissues:
(i) Xylem:
Structurally, xylem consists of both living and nonliving cells. Xylem consist of four elements: tracheids, vessels, xylem fibers and xylem parenchyma (Fig. 3.3).
(ii)Phloem
Phloem consists of four types of elements – sieve tubes, companion cells, and phloem parenchyma and phloem fibers
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