Histologie du tube digestif Flashcards
What is the function of teeth?
Mastication et broyage
How many permanent teeth and how many baby teeth are there?
32 permanent and 20 baby teeth
What are the different parts of teeth?
What type of epithelial tissue is the tongue made of?
Épithélium stratifié non kératinisé which is covering:
- Tissu musculaire (all directions to allow movement) —> skeletal (voluntary)
- Fibroelastic conjunctive tissue
What is found between the faisceaux musculaires of the tongue?
Lobules graisseux
Glandes salivaires:
What kinds? (3)
- Linguales antérieurs —> mixtes
- Von Ebner —> séreuses
- Linguales postérieures —> muqueuses
Histological cut of the tongue:
What are the two main types of papillae?
- Papilles calciformes —> taste buds
- Papilles fungiforme et filliforme —> touch and sensation
What are the principal salivary glands?
- Parotid
- Submaxillary
- Sublingual
What kind of gland is the parotid gland?
séreuse —> secrete aqueous secretions rich in enzymes/proteins, generally central nucleus
What kind of gland is the submaxillary gland?
séromuqueuse —> serous and mucous mixed
What kind of gland is the sublingual gland?
muqueuse —> lipidic secretions that work as lubrification, basal nucleus
What is the function of the salivary glands?
Exocrine glands that secrete saliva into the mouth
What is saliva?
Aqueous substance synthesized by serous glands (enzymes, antibodies, organic ions) and mucous glands (lubrification to facilitate food sliding down esophagus)
What are the three kinds of tonsils and what are their functions?
- Pharyngiennes
- Linguales
- Vélo-palatines
What is the function of the tonsils?
Lymphatic tissue with important role in defence of the respiratory and digestive tract
Very prominent in childhood and get smaller as you get older starting in adolescence
What is the function of the uvula?
10-15 mm long, made of membranous and muscular tissue, important role in swallowing and breathing
Covered in a épithélium pavimenteux stratifié non kératinisé with a muqueuse with a lot of muqueuse and séreuse glands, some striated skeletal muscles are present as well
What is the function of the epiglottis?
Cartilaginous growth of the larynx covered on its forward-facing surface with digestive tissue and on the lower surface with respiratory tissue
Blocks the trachea when swallowing