what is parenchyma collenchyma sclerenchyma
Answers
Parenchymal are living cells in plants for storing food and for temporary support.
Collenchyma are thickened in the corners and helps in support.
Sclerenchyma are dead cells made of lignin.it forms the bark and provides permanent protection
Primary tissues in plants are those which helps in primary growth of a plant. These tissues are of three kinds-
Parenchyma- Isodiametric i shape. Most part of primary plant body made using parenchyma. Their primary function is storage. They are again classified as aerenchyma(for buoyancy), chlorenchyma(for photosynthesis), etc...
Collenchyma- Maybe round,polygonal,oval or sherical in shape.They provide mechanical strength to younger parts of plants. Collenchyma tissues are found in young stems petioles and apex etc.. Thier ends are thickened due to deposition of cellulose, hemicellulose and pectin
Sclerenchyma- They have thick and lignified walls with central lumen. They may be tracheids or sclereids depending on shape.