anatomy of Funaria plz give
Answers
Answer:
,
Explanation:
1. Internally, there is no much specialization of cells. The axis or stem is differentiated into three different regions, i.e., epidermis, cortex and conducting strand or medulla (Fig. 197A). Stem is circular in outline.
2. Single-layered epidermis is the outermost layer, and consists of small chlorophyll-bearing green cells, but mature stems lack chlorophyll. Stomata are absent. In some cases, epidermis may be double- layered.
3. Below the epidermis is the cortex. It consists of large, thin-walled, parenchymatous cells. At maturity, cortex is observed to be differentiated into outer thick-walled and inner thin-walled cortex (Fig. 198). It may also contain chloroplast.
T.S. Axis Passing through Very Old Region
4. Innermost region of conducting strand or medulla consists of narrow, thin-walled and vertically elongated cells. Its function is to provide mechanical support and help in conduction. There is no xylem or phloe
T.S. ‘Leaf’:
1. Leaf consists of central midrib and wings on either side
T.S. Axis and V.S. Leaf
2. There are no mesophyll or stomata in leaf.
3. Midrib is several-celled thick and contains many thin-walled cells of conducting strand. Thin-walled cells are covered by outer sheath of thick-walled cells.
4. The cells of the wings are large, green, parenchymatous and contain many chloroplasts
