Biology

Pith (Medulla):  Pith is moderately huge and prominent, composed of parenchymatous cells and is placed at the center. It is composed of soft, spongy parenchyma…

Medullary ray of connective tissue Thinly walled parenchyma tissue that separates xylem and phloem bundles forms the medullary ray or connective tissue. The cells in…

Formation of periderm: The periderm is composed of the phellogen, phellem, and phelloderm. It is outer defensive secondary tissue formed replacing the epidermis. In woody…

Extra-stelar secondary growth: The secondary growth that takes place as a substitute assess to protect the dermis and other tissues present beneath the epidermis from…

The bark is the outer covering of a tree’s trunk and branches. Its purposes are conserving water and protecting the tree’s essential living systems from…

On the bark of woody plants, there are some lens-shaped or egg-shaped pores present called lenticels. It functions as a pore allowing for the interchange…

Difference between Palisade parenchyma and Spongy parenchyma Palisade parenchyma: Palisade parenchyma is the upper layer of ground tissue in a leaf, consisting of elongated cells…

Mesophyll tissue: All the tissues in between upper and lower epidermis except veins and the branches of veins are called mesophyll tissue. The tissues of…

Upper epidermis: Upper epidermis is a only layer of cells containing few or no chloroplasts. The cells are relatively transparent and permit most of the…

Palisade parenchyma is the upper layer of ground tissue in a leaf, consisting of elongated cells beneath and perpendicular to the upper epidermis and constituting…