Digestive System
Gbogbo ọrọ náà
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.
Ebumnobi
- Identify the parts of the digestive system of a monogastric animal
- Identify the parts of the digestive system of a ruminant animal
- Distinguish between the digestive system of a monogastric and a ruminant animal
- Explain the process of digestion in farm animals
- State the functions of the four compartments of the ruminant stomach
Maapụ uche
E seela isiokwu a ka ị hụ otu echiche si ejikọta.
Kaadị ncheta
Omume ncheta ngwa ngwa n'ihe a na-anwale n'isiokwu a.
Akwụkwọ Ọmụmụ
Yi rajista ka ci gaba
Kpọpụta akaụntụ n’efu ka ị nweta ohere na ihe ọmụmụ niile, ajụjụ omume, ma soro mmepe gị.
Nnyocha Ọmụmụ
Ekele diri gi maka imecha ihe karịrị na Digestive System. Ugbu a na ị na-enyochakwa isi echiche na echiche ndị dị mkpa, ọ bụ oge iji nwalee ihe ị ma. Ngwa a na-enye ụdị ajụjụ ọmụmụ dị iche iche emebere iji kwado nghọta gị wee nyere gị aka ịmata otú ị ghọtara ihe ndị a kụziri.
Ị ga-ahụ ngwakọta nke ụdị ajụjụ dị iche iche, gụnyere ajụjụ chọrọ ịhọrọ otu n’ime ọtụtụ azịza, ajụjụ chọrọ mkpirisi azịza, na ajụjụ ede ede. A na-arụpụta ajụjụ ọ bụla nke ọma iji nwalee akụkụ dị iche iche nke ihe ọmụma gị na nkà nke ịtụgharị uche.
Jiri akụkụ a nke nyocha ka ohere iji kụziere ihe ị matara banyere isiokwu ahụ ma chọpụta ebe ọ bụla ị nwere ike ịchọ ọmụmụ ihe ọzọ. Ekwela ka nsogbu ọ bụla ị na-eche ihu mee ka ị daa mba; kama, lee ha anya dị ka ohere maka ịzụlite onwe gị na imeziwanye.
- 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
- 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
- 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
- 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
- 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
Yi rajista ka ci gaba
Kpọpụta akaụntụ n’efu ka ị nweta ohere na ihe ọmụmụ niile, ajụjụ omume, ma soro mmepe gị.
Yi rajista ka ci gaba
Kpọpụta akaụntụ n’efu ka ị nweta ohere na ihe ọmụmụ niile, ajụjụ omume, ma soro mmepe gị.
Akwụkwọ A Na-atụ Aro
Ajụjụ Nnyocha
Nna, you dey wonder how past questions for this topic be? Here be some questions about Digestive System from previous years.
Ajụjụ 1 Ripọtì
(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
Akọwa Nkọwa
(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
| Goat | Rabbit |
|---|---|
| Ruminant with a four-chambered stomach | Non-ruminant (monogastric) with a simple stomach |
| Digests cellulose mainly in the rumen and chews the cud | Digests cellulose mainly in the large caecum and practises coprophagy |
Yi rajista ka ci gaba
Kpọpụta akaụntụ n’efu ka ị nweta ohere na ihe ọmụmụ niile, ajụjụ omume, ma soro mmepe gị.