Digestive [1] Flashcards
The 3 parts of a tooth are called
Crown
Neck
Root
Name the 6 parts of a tooth from up to down through the medial view
Enamel Dentin Pulp Cementum Periodontal ligament Alveolar bone
Enamel description
Prisms of calcium and carbonate
No cells
Hardest body tissue
No sensation
Dentin description
Similar to ____ but ______ occur _____ instead of _____
Similar to bone but cells are called odontoblasts occur nearby in the pulp instead of scattered through the dentin
Pulp description and what contains
Soft tissue
Blood vessels nerves lymphatic
Cementum what is
Calcified connective tissue covering the root
The periodontal ligament contains ____ linking ____ to _____. It has rapid _____ and needs _____. It contains _____ receptors which serve the functions of ____ and ____.
Collagen Fibres linking the bone of the socket (alveolar bone) to the cementum.
Rapid turnover. Increased collagen synthesis
Needs vitamins C
Mechanireceptors for protection and force transducers.
3 types of papillae on the tongue
Fungi form (mushroom)
Filiform (shark)
Vallate (tastebuds and moat)
We have 3 pairs of salivary glands: _____ (serous only), _____ (mixed) and ______ (mostly mucous)
Parotid (serous only)
Submandibular
Sublingual
Salivary glands are stimulated to secrete stuff in response to the _____. ___ cells secrete watery substances and mucous glands secrete ___ substances.Saliva contains __ ___ + ___. The enzymes are ___ which breaks down ____ and _____ which is _____.
PNS Serous Viscous Water mucous enzymes Amylase Starchy debris Lysozyme Antibacterial
4 functions of digestive system
Digestion
Absorption
Secretion
Transport
4 ways to gain SA
Gross convolutions
Luminal folds (circular or longitudinal)
Projections towards lumen - evagination (villi)
Projections away from lumen (glands)
Name the 4 tunics of the gut tube from top to bottom
Mucosa
Submucosa
Muscularis externa
Serosa
The mucosa contains ____, ____ and _____.
Epithelium
Lamina propria
Muscularis mucosae
The Lamina propria is found in the __. It is made of ____ tissue on which the —— rests, contains ___ and ___ and ____.
Mucosa Lose CT Epithelium Nerves Blood capillaries Defensive cells
Muscularis mucosae is found in the ___. It contains ________ which provides the mucosa with ______.
Mucosa
Two layers of smooth muscle, inner circular and outer longitudinal
Movement independent of external muscle coat
The submucosa is a thick bed of ___ carrying larger ___, ____ and _____ (submucosal ____).
Loose CT Blood vessels Lymphatic vessels Nerves Plexus
The muscularis externa (external smooth muscle) is in ___ layers to produce _____. The inner layer is ___, outer _____. The ___ nerve occurs between layers.
2 Peristalsis Circular Longitudinal Myenteric nerve plexus
The serosa is a _______ except ____. It has __ layers, with outer ___ sitting on a bed of connective tissue. It’s also known as the _____. Where a structure is not in contact with the body cavity, the outer CT layer is called the ____.
Slippery outer covering for the gut tube except oesophagus. 2 Mesothelioma Visceral peritoneum Adventitia
