Difference between spring wood ,autumn wood , heart wood and sap wood??

Dear student,                                                                                                                                                                   
Please find below the solution to the asked query 
Heart wood  Sapwood
Represent the old elements of secondary xylem  Represent the young elements of secondary xylem
Present in central region Present in peripheral region
Dark in colour Light in colour
Physiologically inactive Physiologically active
In spring season, cambium is very active and produces a large number of xylary elements with wider vessels. This wood is called spring wood or early wood. It is lighter and has lower density.

In winters, xylem is less active and forms fewer xylary elements with narrow vessels. This wood is called autumn wood or late wood. It is darker and has higher density.

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