TISSUES Flashcards
A group of closely associated cells that perform related functions and are similar in structure.
Tissues
properties of plant tissues
- most are dead tissues
- cells of some tissues are alive
- has continuously dividing cells
Plant tissues can be classified as:
meristematic
permanent
Composed of actively dividing cells, responsible for the production of cells.
meristematic tissues
Capacity for division is restricted to certain parts of the plant body called
meristems
These tissues are present in the tips of stems and roots. They help in the growth of stems and roots.
apical meristematic tissue
These tissues are present in in the sides of stems and roots. For ex- Cambium in stem and root. They help to increase the girth of the stems and roots
lateral meristematic tissues
These are present at the base of leaves and internodes. These help in growth of branches and leaves.
intercalary meristematic tissues
Tissues that attained their mature form and perform pacific functions.
permanent tissues
types of permanent tissues
simple
complex
consist onolyfonekindofcells
simple permanent tissue
- external tissues
- forms protective covering of the plant body
dermal or surface tissue
types of surface tissue
epidermis
peridermal
- the outermost layer of the primary plant body
- covers the leaves, floral parts, fruits, seeds, stems and roots
epidermis
pores for gas exchange
stomata