A dominant gene will always be expressed when present, such as in the homozygous dominant genotype (RR), or heterozygous genotype (Rr). A recessive allele is only expressed wh â¦ en the genotype is homozygous recessive (rr).
(Lung alveoli, in contrast, are lined by very thin simple squamous epithelium .). Pseudostratified respiratory epithelium consists primarily of columnar ciliated cells. Ciliary beating sweeps mucus and the dust it carries up the bronchi and trachea toward the pharynx, where it can be swallowed.
what is the difference between the pseudostratified epithelium in the primary bronchi and the trachea. less goblet cells in the primary bronchi. what is the lamina propria of the primary bronchi. dense fibroelastic connective tissue with elastic fibers, diffues lymphatic tissue , serous, mucous glands, blood vessels. what does the mucous layer of the primary bronchus have that the trachea does not have.