Digestive System

Overzicht

Put a pig and a goat in the same paddock in Jos and feed them nothing but dry maize stover for a week. The goat holds its condition. The pig loses weight fast. Both animals have a mouth, a stomach and intestines, so the difference cannot be that one eats and the other does not. The difference is what happens between the mouth and the intestine, and that is the whole subject of this lesson.

You will trace two digestive tracts organ by organ: the pig's simple, single-chambered system, and the cow or goat's four-compartment ruminant system. You will meet the rumen's population of microbes, the only workforce on the farm that can actually break down cellulose, and see exactly why a compound stomach turns rough, fibrous, cheap feed into meat and milk. Nearly every later topic on nutrition and feeding assumes you already know this system cold, so build it carefully now.

Doelstellingen

  1. Identify the parts of the digestive system of a monogastric animal
  2. Identify the parts of the digestive system of a ruminant animal
  3. Distinguish between the digestive system of a monogastric and a ruminant animal
  4. Explain the process of digestion in farm animals
  5. State the functions of the four compartments of the ruminant stomach

Lesnotitie

A feed salesman in Ilorin once sold a smallholder a sack of poultry-style concentrate for her two goats, promising faster gains than grazing. Within a fortnight one goat was bloated and off its feed. The salesman had ignored something a WAEC candidate must know cold: a goat's stomach is not built like a chicken's or a pig's, and feeding it the wrong way disturbs an entire population of living microbes inside it. Knowing how a gut is built, not just that it exists, is what separates sound livestock management from an expensive mistake.

Lesevaluatie

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Je zult een mix van vraagtypen tegenkomen, waaronder meerkeuzevragen, korte antwoordvragen en essayvragen. Elke vraag is zorgvuldig samengesteld om verschillende aspecten van je kennis en kritisch denkvermogen te beoordelen.

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  1. Which of the following is the correct order in which feed passes through the compartments of a ruminant stomach? A. Reticulum, rumen, abomasum, omasum B. Rumen, reticulum, omasum, abomasum C. Omasum, reticulum, rumen, abomasum D. Rumen, omasum, reticulum, abomasum Answer: B
  2. The true, glandular stomach of a ruminant, which secretes hydrochloric acid and pepsin, is the: A. Rumen B. Reticulum C. Omasum D. Abomasum Answer: D
  3. The main compounds absorbed from the rumen as an energy source, produced by microbial fermentation of fibre, are called: A. Amino acids B. Volatile fatty acids C. Simple sugars D. Bile salts Answer: B
  4. Which organ in the pig performs a fermentation role broadly similar to, but much smaller than, the ruminant rumen? A. Duodenum B. Caecum C. Oesophagus D. Reticulum Answer: B
  5. The regurgitation and re-chewing of partly fermented feed by a ruminant is known as: A. Peristalsis B. Egestion C. Rumination D. Mastication Answer: C

Aanbevolen Boeken

Introduction to Animal Science: Global, Biological, Social and Industry Perspectives
Introduction to Animal Science: Global, Biological, Social and Industry Perspectives
Ondertitel: Sixth edition
Uitgever: Pearson
Jaar: 2017
ISBN: 978-0-13-443605-0
Beschrijving: A comprehensive introduction to animal science covering anatomy and physiology, nutrition, genetics, reproduction, animal health and the major farm animal species and their production systems.
Small-scale Poultry Production: Technical Guide
Small-scale Poultry Production: Technical Guide
Uitgever: Food and Agriculture Organization of the United Nations
Jaar: 2004
ISBN: 978-92-5-105082-8
Beschrijving: An FAO Animal Production and Health Paper written by a Nigerian animal scientist, covering breeds, housing, feeding, incubation, disease control and marketing for small-scale poultry keepers in developing countries.
Tropical Animal Feeding: A Manual for Research Workers
Tropical Animal Feeding: A Manual for Research Workers
Uitgever: Food and Agriculture Organization of the United Nations
Jaar: 1995
ISBN: 978-92-5-103758-4
Beschrijving: An FAO Animal Production and Health Paper on the principles of ruminant and non-ruminant nutrition and the practical use of tropical feed resources, including crop residues and by-products, in sustainable livestock systems.

Eerdere Vragen

Benieuwd hoe eerdere vragen over dit onderwerp eruitzien? Hier zijn een aantal vragen over Digestive System van voorgaande jaren.

WAEC SSCE - Animal Husbandry - 2021

Vraag 1 Verslag

(a) State four ways in which livestock 1s important

(b)i. Mention sIx organs associated with the digestive system in rabbits.

(ii) State two functions of the alimentary canal in livestock

(c)i. State lour functions of the liver in farm animals

(ii) Mention two parasites that could be found in the liver of cattle

(d) State two differences between the digestive s systems of a goat and a rabbit

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