NCERT Solution: Tissues
Tissue is a group of cells that are similar in structure and are organised together to perform a specific task.
In multicellular organisms, the different types of tissues perform different functions. Since a particular group of cells carry out only a particular function, they do it very efficiently. So, multicellular organisms possess a definite division of labour.
Simple permanent tissues are of three types:→ Parenchyma
→ Collenchyma
→ Sclerenchyma
Parenchyma tissue is of further two types:
• Aerenchyma
• Chlorenchyma
Apical meristem is present at the growing tips of stems and roots.
Sclerenchyma tissue makes up the husk of coconut.
The constituents of phloem are:
→ Sieve tubes
→ Companion cells
→ Phloem parenchyma
→ Phloem fibres
Muscular tissue
Neuron look like a star shaped cell with a tail.