NOTES OF CLASS 8

Structure of root :- 

• Root is underground part of plant.
• Root hairs are unicellular structure of root which absorb the water and dissolved minerals from soil.
• Root hairs originate from epidermal cell.
• Cell membrane and cell wall of root hairs are very thin and concentrated cell sap is filled in root hair cells.
• Root hairs have large surface area so it is an adaptation for absorption of water and minerals.

Active transport :- Transport of molecules and ions against concentration gradient ( from less to more ) by using energy molecule ATP is called active transport.

In plants, minerals are absorbed and transported through active transportation .

Path of water and mineral ( sap ) in the plant :- This diagram will illustrate the path of sap in plants from root to leaves -

Internal structure of root :- 

Draw above diagram and its description will appear in tomorrow's notes.

take care ..... Bye.