In 1839, Theodor Schwann would expand Schleiden's cell theory to include the animal world, establishing cell theory as the fundamental concept in biology. Schleiden included this article and others in a botany textbook--one that introduced new teaching methods which would dominate the instruction of botany for years.
Nasal septum: The dividing wall that runs down the middle of the nose, separating the two nasal ' cavities, each of which ends in a nostril. The nasal septum is composed of bone, cartilage, and 'membranes.
Deviated septum. Overview. Deviated septum A deviated septum occurs when your nasal septum is significantly displaced to one side, making one nasal air passage smaller than the other. A deviated septum occurs when the thin wall (nasal septum) between your nasal passages is displaced to one side. In many people, the nasal septum is displaced â or deviated â making one nasal passage smaller.