Digestive Flashcards
Functions of the digestive system
Ingestion
Digestion
Secretion
Mixing and propulsion
Absorption
Excretion
Series of organs in which ingested material moves
Digestive (GI Tract)
Not part of the GI tract but has functions associated with digestive activity
Liver, pancreas, gallbladder, salivary glands
Accessory digestive organs
It is a continuous tube divided into different organs
GI tract
Sections of GI tract from superior to inferior
Mouth
pharynx
Esophagus
Stomach
Small intestine
Large intestine (colon)
Anus
Aids in breakdown of ingested materials
Accessory organs
Accessory organs from superior to inferior
Teeth
Tounge
Salivary glands
Pancreas
Liver
Gallbladder
The inferior space of the GI tract
Lumen
4 layers of the GI tract
Mucosa
Submucosa
Muscularis
Serosa
Non keratinized stratified squamous epithelium lines mouth, pharynx, esophagus and anal canal
Mucosa
Composed of dense connective tissue with blood and lymphatic vessels
Submucosa
Most sections of the GI tract contain 2 layers in the __________
Muscularis
Superficial wall layer furthest from the muscularis
Serosa
Uses force generated by muscles to digest nutrients
Mechanical digestion
Utilizes enzymes and other secretions to break down ingested material
Chemical digestion
Sequencial alternating waves of contraction and relaxation by layers of muscularis
Peristalsis
Serous membrane that holds abdominal organs in position
Peritoneum
Helps hold abdominal organs in place
Mesenteries
Also known as oral cavity
Mouth
Functions in ingestion, swallowing, sensation and speech
Tounge
Secretes saliva into oral cavity
Salivary glands
Begins chemical digestion and moistens food
Saliva
Organs similar to bones that are used tear grind and mechanically breakdown food
Teeth
Funnel like passageway for food and air
Pharynx
Flat muscular tube that connects pharynx to stomach
Esophagus
Hollow muscular organ that continues chemical and mechanical digestion
Stomach
Retroperitoneal organ at posterior of abdomen
Both an endocrine and digestive organ
Pancreas
Digestion begins in the
Mouth
Begins with acid in the stomach
Protein digestion
Pancreatic enzymes are involved in this digestion
Nucleic acid digestion
Digestion converts material into small molecules that can be easily __________
Absorbed
Are absorbed as monosaccharides
Carbohydrate absorption
Bile acids in ___________ emulsify ______
Lipid digestion
Lipid