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leaf - Coggle Diagram
leaf
leaves
leaves are attached to the stem by a stalk or petiole
dycots leaf- has network veins
seeds are easy to split in half
monocot leaf- prallel veins
seeds are hard to split
vascular bundle
contains xylem and phloem veseles to help transport substances throught the plant
layers of leaves
wax cuticle
prevents water from evaporating out of the leaf
upper epidermis
its transparent to let light to enter
mesophyll layer
pallisade mesophyll
cells are narrow to have the maximum number of cells to be there
contains chloroplast
spongy mesophyll
chloroplast also present here
called spongy because theres alot of air space between them and they dont have a regular shape
lower epidermis
has guard cell
guard cells has chlorohyll
they will swell up when they absorb water. this opens the stomatas to allow gas exchange.
has stoma
it allows the diffusion of gasses
the "nose" of the leaf
stoma= 1 stoma stomata= 2 or more stoma
definition- tiny pores in the epidermis
how leafs are adapted for sunlight absorbtion
broad and flat surface
position of exchange
large surface area
nutrition
magnesium
for the manifacture of chloroplast
deficentcy will lead to yellow leaves
nitrogen
for the manifacture of protein, nuclic acid , and plant hormons
deficency will lead to bad growth