Hydrogin is gin and water. H20 is hot water, and CO2 is cold water. Three kinds of blood vessels are arteries, vanes, and caterpillars. Blood flows down one leg and up the other. Dew is formed on leaves when the sun shines down on them and makes them perspire.
Mushrooms always grow in damp places, and so they look like umbrellas.
A large, empty space where the pope lives.