HISTOLOGY of the Respiratory Tract Flashcards
LAYERS of the TRACHEA & MAIN BRONCHI around the LUMEN:
- MUCOSA
- SUBMUCOSA
- ADVENTITIA
MUCOSA layer has 2 components:
EPITHELIUM & LAMINA PROPRIA
Type of EPITHELIUM in RESPIRATORY TRACT (MUCOSA)
PSEUDOSTRATIFIED COLUMNAR
- CILIATED
what is INTERSPERSED in the PSEUDOSTRATIFIED COLUMNAR EPITHELIUM
GOBLET CELLS - Mucous
BASAL CELLS - possible STEM cells for replacement of lost cells
what does the LAMINA PROPRIA of the MUCOSA LAYER consist of
- many LYMPHOCYTES
(INFLAMMATORY cells)
supported by a meshwork of
ELASTIC FIBRES & RETICULAR (COLLAGEN) FIBRES
& Blood Vessels
SUBMUCOSA LAYER consists of:
LOOS CONNECTIVE TISSUE
contains
- SEROUS GLANDS
- MUCOUS GLANDS
(ducts empty into lumen)
what do SEROUS GLANDS (SUBMUCOSA layer) SECRETE
WATERY PROTEINACEOUS Product
(consisting of protein)
SEROUS GLANDS (SUBMUCOSA layer)
- how are the NUCLEI
- where is SECRETION from
- ROUNDED NUCLEI at the BASE of the cells
- SECRETION at the APEX of the cell
how are the CELLS (nuclei) of the MUCOUS GLANDS (SUBMUCOSA layer)
have FLATTENED NUCLEI
- due to HEAVIER MUCUS in the LUMEN
what is the MOST PROMINENT tissue layer
ADVENTITIA
what does the ADVENTITIA LAYER Consist of
DENSE CONNECTIVE TISSUE
HYALINE CARTILAGE (C-shaped rings in trachea and plates in bronchi)
SMOOTH MUSCLE fills gaps between cartilage
what make the TRACHEA a RIGID structure
CARTILAGE and MUSCLE
what TYPE of CARTILAGE is the C-RINGS and PLATES in trachea and bronchi (ADVENTITIA layer)
HYALINE CARTILAGE
the MATRIX of the CARTILAGE STAINS what colour
PURPLE
CARTILAGE CHONDROCYTES sit in..
spaces called LACUNAE
