Animal Husbandry WAEC

Digestive System

Übersicht

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.

Ziele

  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

Mindmap

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Lernkarten

Schnelles Abfragen der Fakten, die zu diesem Thema gepruft werden.

Lektionshinweis

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.

Unterrichtsbewertung

Herzlichen Glückwunsch zum Abschluss der Lektion über Digestive System. Jetzt, da Sie die wichtigsten Konzepte und Ideen erkundet haben,

Sie werden auf eine Mischung verschiedener Fragetypen stoßen, darunter Multiple-Choice-Fragen, Kurzantwortfragen und Aufsatzfragen. Jede Frage ist sorgfältig ausgearbeitet, um verschiedene Aspekte Ihres Wissens und Ihrer kritischen Denkfähigkeiten zu bewerten.

Nutzen Sie diesen Bewertungsteil als Gelegenheit, Ihr Verständnis des Themas zu festigen und Bereiche zu identifizieren, in denen Sie möglicherweise zusätzlichen Lernbedarf haben.

  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

Empfohlene Bücher

Introduction to Animal Science: Global, Biological, Social and Industry Perspectives
Introduction to Animal Science: Global, Biological, Social and Industry Perspectives
Untertitel: Sixth edition
Verleger: Pearson
Jahr: 2017
ISBN: 978-0-13-443605-0
Beschreibung: 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
Verleger: Food and Agriculture Organization of the United Nations
Jahr: 2004
ISBN: 978-92-5-105082-8
Beschreibung: 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
Verleger: Food and Agriculture Organization of the United Nations
Jahr: 1995
ISBN: 978-92-5-103758-4
Beschreibung: 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.

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Wiederholungsfragen

Fragen Sie sich, wie frühere Prüfungsfragen zu diesem Thema aussehen? Hier sind n Fragen zu Digestive System aus den vergangenen Jahren.

WAEC SSCE - Animal Husbandry - 2021

Frage 1 Bericht

(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

Antwortdetails

(a) Four ways in which livestock is important

  • Source of food such as meat, milk and eggs.
  • Source of income and foreign exchange to the farmer and nation.
  • Source of raw materials for industry (hides, skin, wool, bone).
  • Source of organic manure for crop production, and of draught (work) power.

(b)(i) Six organs of the digestive system in rabbits

  • Mouth
  • Oesophagus
  • Stomach
  • Small intestine
  • Caecum (large in the rabbit)
  • Large intestine (rectum/anus)

(b)(ii) Two functions of the alimentary canal

  • Digestion of food into simple absorbable forms.
  • Absorption of digested nutrients into the blood, and egestion of undigested material.

(c)(i) Four functions of the liver

  • Secretes bile which emulsifies fat during digestion.
  • Stores glycogen, vitamins and minerals (e.g. iron).
  • Detoxifies harmful/poisonous substances in the body.
  • Deaminates excess amino acids and destroys worn-out red blood cells.

(c)(ii) Two parasites found in the liver of cattle

  • Liver fluke (Fasciola species).
  • Hydatid cyst (larva of the tapeworm Echinococcus).

(d) Two differences between the digestive systems of a goat and a rabbit

GoatRabbit
Ruminant with a four-chambered stomachNon-ruminant (monogastric) with a simple stomach
Digests cellulose mainly in the rumen and chews the cudDigests cellulose mainly in the large caecum and practises coprophagy
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