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.
Symptoms of upper airway obstruction include difficulty breathing, wheezing, agitation, gasping, and more. Pleural effusion. Pleural effusion is buildup of fluid in the pleura and can cause difficulty breathing or chest pain. Bronchiolitis. Bronchiolitis, a common lung infection in children, causes a runny nose, cough, fever, wheezing and more. Epiglottitis Epiglottitis is a rare, life-threatening illness that keeps air from getting to the lungs.