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skin - acts as a physical barrier; mucus and ciliated cells on mucous membrane in trachea - catch pathogens and sweep them up out of lungs; stomach acid - kills bacteria
Differences:Plant cells have cell walls, animal cells do not.Plant cells have vacuoles, animal cells do not.Plant cells have chloroplasts, animal cells do not.Similarities:Both plant and animal cells have...
(First would talk through the structure of the heart using a diagram).Deoxygenated (lacking oxygen) blood from the body arrives into the heart via the vena cava. This empties into the right atrium a...
A waxy cuticle is present. This is a waterproof, transparent layer that prevents evaporation of water due to heat from the sun. Because it is transparent, it allows sunlight to pass through to the palisad...
The body has many ways in which it deals with 'foreign invaders', like a rhinovirus (the virus responsible for the common cold). Once an infective micro-organism enters the body, lots of different cell t...
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