2.3B Stem structure Flashcards
1
Q
what are the main components of a stems structure (from outer to inner)
A
- epidermis
- cortex
- phloem
- cambium
- xylem
- pith
2
Q
which parts of the stem belong to the vascular bundle
A
phloem
cambium
xylem
3
Q
how thick is the epidermis
A
one cell thick
4
Q
What is secreted in young cells by the epidermis
A
waterproof cuticle
5
Q
what is the epidermis replaced by in older cells
A
bark
6
Q
what is the function of the cortex
A
a thicker layer of “packing” cells. Gives young plants strength + flexibility
(source of plant fibres: sisal and hemp)
7
Q
what is the function of the pith
A
- food storage in young plants, (absent in older plants)
8
Q
A
