Registration numbers must be not less than three inches (3) in height and the. documented name must be in 4-inch letters. Spaces or hyphens should be equal to the. width of a letter other than I or a number other than 1. On vessels so configured that a.
Sponge Animation: Spicules. Spicules are microscopic structures of hard crystal material with fantastic shapes unique to the different species of sponge. They are part of the skeleton that helps give the sponge its shape.
A solitary pulmonary nodule (SPN) is a single abnormality in the lung that could be harmless or could be an early sign of cancer. Find out more from WebMD about causes, diagnosis, and treatment of SPN.