Secondary Thickening

Question 1

Year 1

Answer 1

Vascular cambium forms a ring

Question 2

Year 2

Answer 2

Vascular cambium produces 2nd xylem (inside) and phloem (outside). Xylem becomes wood when laid down with lignin. This causes the expansion of the stem.

Question 3

What happens in year 2 with the outward expansion of the stem?

Answer 3

The epidermis ruptures, causing more cork cells to be created by the Cork cambium to fill the gaps.

Question 4

Xylem is responsible for?

Answer 4

Xylem is responsible for the transport of water and nutrients from the roots to the leaves.

Question 5

Phloem

Answer 5

Phloem is responsible for the multidirectional distribution of nutrients.

Question 6

Name the parts

Answer 6

Cork/epidermis
Primary phloem
Secondary phloem
Cambium
Secondary xylem (summer)
Secondary xylem (spring)
Primary xylem

Around has the medullary rays