University:
Sam Houston State University
Course:
BIOL 1406 | General Biology I
Academic year:

2020
Views:

326

Pages:

13
Author:

StellarSymphony

Avian Digestive Systems Characterized by several organs not found in other species that are adapted for grinding hard or encased food Avian Digestive Systems • Mouth – no teeth which leads to the saying “scarce as a hen’s teeth!!” – Salivation excretion moistens food • Esophagus – has a modification called the “crop” which stores and moistens food – connects mouth and stomach Avian Digestive Systems • Stomach – Contains two parts • Proventriculus: same as monogastric stomach and provides digestive excretions • Gizzard: located after proventriculus, very muscular, used to grind food Avian Digestive Systems • Small Intestine – similar functions as in ruminants and monogastric systems • Large Intestine – similar functions as in ruminants and monogastric systems – “cloaca”: chamber into which urinary and genital canals open – “ceca”: aids in fiber digestion and absorption Equine Digestive Systems Characterized by non-ruminant animals that consume and digest feeds high in fiber Equine Digestive Systems • Mouth – intact top and bottom incisors – molars adapted to chewing fibrous feeds – no digestive enzymes in saliva • Esophagus – not well adapted for regurgitation – connects mouth and stomach Equine Digestive System • Stomach – similar to monogastric system • Small intestine – similar to monogastric and ruminant systems – no gall bladder to store bile – enlarged cecum to aid in fiber breakdown Equine Digestive System • Large Intestine – similar to monogastric systems – cecum (at junction of small and large intestines) and colon take up most of the volume of the equine digestive system Accessory Organs Organs that aid in the digestive process without actually being part of the digestive system Accessory Organs • Pancreas – produces and secretes digestive enzymes – produces insulin which regulates carbohydrate metabolism • Liver – produces bile-breaks down fatty acids – stores iron, handles fats and carbohydrates in the blood