digestive Flashcards
list the segments of the digestive tract in the correct sequence
Headgut
Foregut
midgut
hindgut
what is the function of the small intestine?
The major site for digestion, where most of the carbohydrates, lipids and proteins are absorbed.
what are vili and what are they made from? and what is there function?
Vili are fold in the skin, they are lines with microvili, which are further folds. (this maxamises surface area)
Inside of the villi are capillary beds that surround lacteal which are the central lymphatic vessels. Deep to the capillary are the vessels connected superficial to the muscle layer. This makes up the mucosa layer.
list the specialised rumanent organs in the correct order
Rumen, Reticulum, Omasum, Abomasum
what are features of the rumen organ
stores and processes plant material
(37 celsius)
Thick and large hair like texture which allows for mechanical breakdown
ideal enviroment for fermentation
lots of gas build up from the fermentation
what are features of the reticular organ
physically breaks down material
Honeycomb texture
what are features of the omasum organ
Highly folded for a large surface area for absorption of water and salts.
The folds are laminae and they squeeze the moisture out of the ingesta
what are features of the abomasum organ
‘true stomach’
enzymatic digestion
secretes digestive juice
absorbes some nutrients
list the four acessory organs
Salivary glands, pancreas, liver, galbadder
what is the function of the galbladder
stores bile that the liver produces. This bile becomes concentrated and is then released into the duodenum which breaks down fats.
what is the function of the pancreas (digestive)
both exocrine (produce insulin) and endocrine (Pancreatic juice) functions, the pancreatic juice made from water, enzymes and electrolytes are secreted into the duodenum via the pancreatic duct.
What is the function of the liver (digestive)
produces bile, detoxification: protein synthesis, metabolism, stores glycogen, decomposition of RBC, plasma protein synthesis, hormone production.
what enzymes is most common in saliva
amylase
Identify the components of the avian digestive tract
Explain the processes of motility, secretion, digestion & absorption
Motility: allows the food to either be propulsed along the tract or mixed.
Secretion: helps regulate gastral tract function through secretory organs (pancreatic juice, salvia, bile ect) hormones, paracrine and autocrines.
Digestion: when macromolecules are broken down to simpler molecules through hydrolysis.
Absorption: smaller molecules are absorbed by the gastrinal tract into the bloodstream or lymphatic system.
