histogen. n. 1. (Botany) (formerly) any of three layers in an apical meristem that were thought to give rise to the different parts of the plant: the apical meristem is now regarded as comprising two layers. See corpus, tunica.a Regenerative Medicine company) and is on the Surgical Faculty for the Procedural Dermatology Fellowship at the University of California at Irvine, Dermatology Faculty, Western University/Pacific Hospital, Long Beach, California and Michigan State University, Dermatology Faculty.
People with fluid in the lungs will experience the following signs and symptoms. 1  Fatigue. 2  Breathing difficulties. 3  Weakness. Cough. 4  Grunting. Pale 5  skin. Restlessness.  Excessive sweating.
Causes of Water in the Lungs. Your lungs: where water and air should meet, not mingle. Photo Credit chinese woman holding an x-ray image by Allen Penton from Fotolia.com. Your body is composed of more than 60 percent water, and your lungs are made up of close to 90 percent water, according to the U.S. Geological Survey.