Outer part of what plant? If you're referring to a tree it's bark. But it's also cellulose, an indigestible fiber for most animals with exception to deer, elk, cows, etc. which have stomach enzymes to break such material down, but generally they only eat bark and twigs when they're starving during the winter.
Coir is the hairy, fibrous outer part of a coconut.
Cell wall 😉
The cell wall
That is the cell wall.It is the outer most layer.
because i don't no ignore that person, it is called a cotyledon :]
It supports and stregthens the outer part of the cell
For human bodies: the hair, nails and outer skin have no cells.
The definite boundary of wall that is part of the outer structure of certain cells, as a plant cell.
A cell wall, usually found in plant cells, is rigid.
Outer.
The cell wall
The definite boundary of wall that is part of the outer structure of certain cells, as a plant cell.