lab quiz 5 Flashcards
a cavity or hole inside of a tube, blood vessel or hollow organ.
lumen
small, ball-shaped cluster of secretory cells surrounding ducts
acini
a tubular structure that transports secretions of a gland.
duct
large, roundish projections or divisions of an organ.
lobes
small divisions of the cells in an organ, forming a functional unit.
lobules
a very thin tunic made of simple squamous epithelium that surrounds the outside of
the organ.
serosa
rather empty looking tunic in most
organs, containing only scattered nuclei, a few wavy collagen fibers and sometimes glandular
tissue.
submucosa
tunic closest to the lumen
mucosa
layers of mucosa (superficial to deep)
1.muscularis mucosa
2. lamina propria
3. epithelium
tunics of alimentary canal (superficial to deep)
- serosa
- muscularis externa
- submucosa
- mucosa
very thin layer of
smooth muscle, usually quite distinct as a dark pink ban
muscularis mucosa
A loose matrix of cells and ground
tissue
lamina propria
protects the organ from the contents of the lumen
epithelium
lies immediately inside the serosa. It is comprised of at least two layers
of the smooth muscle - the outer layer always has muscle fibers running longitudinally down the
organ and the next layer in has muscle fibers running circularly around the organ. The muscle
layers help in peristalsis; the wavelike movement of muscles moving foodstuffs through the
alimentary canal to the outside of the body
muscularis externa
