U1, L1 Intro to GI Flashcards
The wall of the GI tract consists of __ tunics
4 tunics
The mucosa lines the ____ .
Lumen of the alimentary canal
The 3 major functions of the mucosa are…
secretion of mucus, absorption of the end products of digestion, and protection
against infectious disease.
The mucosa consists of __ layers. Name these layers.
3; Lining epithelium, lamina propria, and muscularis.
The 4 tunics are…
Mucosa, submucosa, muscularis externa, and serosa.
Lining epithelium mucosa layer contains ____ epithelium and ___ cells
simple columnar; goblet cells
The lamina propria is formed by ___ tissue. It absorbs nutrients and contains ____ .
Loose areolar connective tissue; lymph nodes
Muscularis contains ___ cells for local mucosa movement
smooth muscle cells
The submucosa is __ tissue containing ___, ___, ___, and ___ .
areolar connective; elastic fibers, lymph nodes, nerves, blood vessels.
Muscularis externa is responsible for ____.
segmentation and peristalsis.
Serosa is the ____ .
protective outermost peritoneum.
the __ lubricates digestive organs.
peritoneum
the __ is a double layer of peritoneum. .
mesentary
The job of the mesentary is to __, __ and __.
provide vascular and nerve supply to viscera, hold digestive organs in place, and stores fat.
intraperitoneal organs are ___ surrounded by peritoneum.
completely
