(i) | The first formed primary xylem elements are called protoxylem and the later formed primary xylem is called metaxylem |
(ii) | Primary xylem is endarch in stems |
(iii) | Primary xylem is exarch is roots |
(iv) | Phloem transports food materials, usually from leaves to other plants parts |
(v) | Vessel members are interconnected through perforations in their common walls |
(vi) | Tracheids are elongated or tube like cells with thick, lignified walls and tapering cells |