The digestive system Flashcards
What is the alimentary canal?
The continuous musclar tube running from mouth to anus
How long is the gastro intestinal tract?
5-7m
What is peristalsis?
The action that moves things through muscular tubes
Name component x:
Submucosal plexus (plexus of Meissner)
What is the submucosal plexus (plexus of Meissner)
A neural network located within the submucosa
What is component x?
Glands in the submucosa
What is component x?
The submucosa
What is component x?
Glands in mucosa
What is component x?
Lymphatic tissue
What is component x?
Lumen
What are components A, B & C?
A - Epithelium
B - Lamina Propria (areolar tissue)
C - Muscularis Mucosae
What is the serosa and what are its two components ?
Serous membrane (serosa) is smooth tissue membrane that secretes serous fluid. It consists of:
-Areolar connective tissue
-Epithelium
What is component x?
The myenteric plexus (Auerbach’s plexus)
What type of tissue is sub mucosa?
Dense irregular connective
What is component x?
Mesentery
Where is stratified squamous epithelium found within the alimentary canal?
-Mouth
-Oesophagus
-Oropharynx
-Anal canal
(because it is usually more protective)
What is interstitial fluid?
Fluid found in the spaces around cells. It comes from substances that leak out of blood. It helps bring oxygen and nutrients to cells and to remove waste products from them.
What happens to excess interstitial fluid around the cells?
It is drained away by lymphatic capillaries and into the lymphatic system to become lymph.
What does MALT stand for and why is it important?
Mucosa Associated Lymphoid Tissue
Reservoirs for the immune system. Once it has been introduced to a pathogen it remembers and retains it ready for the next encounter.
Where is the parotid salivary gland located?
In front of the ear
Where is the sublingual gland located?
Under the tongue (these glands produce around 70% of saliva)
Where is the submandibular gland?
Deep in the mouth, can be felt at the top of the neck.
Where is the uvula?
What are the gingivas?
The tissue around the base of the teeth (gums)