Micrographs of the root
Meanwhile a lot is happening where you can’t see it!
Look at the plant roots!
The roots of plants are amazing structures. This whole mount viewed longitudinally (through the light microscope) shows the epidermis (yellow arrow). The meristem gives rise to the root cap and the cells of the root itself (white circle). The root cap (blue arrow) is at the tip of the root.
Around all the sides of the root and mainly right around the tip, root hairs protrude from the root. Root hairs absorb water and nutrients. They are modified epidermal cells.
When the root is just emerging from the seed and beginning to form branch roots, the vascular tissues are still developing and are not easily identified.
As the root matures, all tissues become well defined and can be stained to distinguish one type of tissue from another.
One way to look at roots dimensionally at a higher magnification is to use a scanning electron microscope (SEM). This process does not allow for color to identify these tissues.