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There are more stomata on the lower epidermis compared to the upper epidermis

The number of stomata helps to slow down the rate of transpiration, and hence the rate of water loss

·       The lower side is less exposed to the Sun, thus reducing rate of evaporation of water

·       The lower side is more protected from wind, allowing water vapour to build up under the leaf. This decreases the water vapour concentration gradient between the inside and outside of leaf, which reduces the rate of diffusion of water vapour, and the rate of transpiration

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Leaf 2 has two layers of palisade mesophyll cells, while Leaf 1 only has one layer of palisade mesophyll cells.

More layers of palisade mesophyll means that the leaves contain more chloroplasts that has more chlorophyll to absorb more light energy. Therefore, leaf 2 has a higher rate of photosynthesis.

Leaf 2 is better adapted for photosynthesis.

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Epidermis = Skin

·       Outer layer of organism.

·       Protective function, against injuries

·       Prevent loss of water via evaporation

Mesophyll = Muscle / Fat

·       Main bulk of tissues between the layers of skin

Mesophyll = Digestive System

·       Responsible for providing nutrition to the organism

·       Plants produce their own food through photosynthesis, humans digest food to obtain nutrients

Mesophyll = Alveoli / Lungs

·       Air spaces in leaf resemble the alveolar space

·       Thin film of moisture around mesophyll cells similar to that around alveoli

·       Site of gaseous exchange

Vascular bundle =  Blood vessels

·       Transports different substances through the organism

Guard Cell & Stomata = Nose & Nostrils, OR Lips & Mouth

·       Controls the movement of gases in and out of the organism

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Epidermis (skin):

Skin on humans protect organs which is similar to the epidermis of plants protecting the leaf

Palisade mesophyll (stomach):

Palisade mesophyll

Spongy mesophyll (alveoli):

Both spongy mesophyll in plants and alveoli in humans as both are the site for gaseous exchange

Vascular bundle (blood vessel):

Both blood vessels in humans and vascular bundles in plants transport nutrients around

Guard cell & Stomata (Nose):

Guard cells & stomata in plants and nose for humans all allows gases to leave and enter

# data[].attributes.body
epidermis : skin

palisade mesophyll : small intestine

spongy mesophyll : alveoli

vascular bundle : blood vessel

guard cell : diaphragm

stomata : nose

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epidermis = skin

mesophyll = lungs

vascular bundle = blood vessels

guard cell and stomata = mouth and nostrils

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epidermis - skin

protects the leaf/ body

mesophyll - lungs

diffusion of gases in and out/ respiration

vascular bundle - arteries/ veins

transport of food and water/ carry red blood cells that carry oxygen and food

guard cell - diaphragm

expands and contracts the lungs for gaseous exchange.

stoma - nose

opening for exchange of gases

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epidermis - epithelial cell

mesophyll - muscles cell

vascular bundle - blood vessels

guard cell -diaphragm

stoma -nostrils

# data[].attributes.body
epidermis : skin

mesophyll: liver

vascular bundle :blood vessel

guard cell and stoma: ribcage / nose

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PUT YOUR GROUP MEMBERS' NAMES AS THE TITLE OF EACH POST

Compare the number of stomata in the upper and lower epidermis. Suggest reasons for this difference.

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PUT YOUR GROUP MEMBERS' NAMES AS THE TITLE OF EACH POST

Compare the palisade mesophyll of leaves 1 & 2.

Suggest the advantage that leaf 2 has over leaf 1.

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PUT YOUR GROUP MEMBERS' NAMES AS THE TITLE OF EACH POST

The leaf serves various functions, including a protective function, nutrition (photosynthesis) as well as gaseous exchange.

As a group,

1. Name the equivalent human body part for each structure of the leaf.

Parts to match: Epidermis, Mesophyll, Vascular Bundle, Guard Cell & Stoma.

2. Explain your reasoning for each answer.