Respiratory System

Aperçu

Walk into an overcrowded broiler house near Ogbomoso at midday and you will hear it before you see it: hundreds of birds standing with beaks open, wings held slightly away from the body, breathing fast and shallow. A healthy animal's breathing is something you barely notice. A struggling one announces itself through its breathing long before anything else goes visibly wrong, which is exactly why WAEC expects you to know this system cold.

In this lesson you will trace air on its journey from the nostrils to the alveolus, the microscopic sac where the real work of breathing happens, and learn exactly how oxygen and carbon dioxide swap places there by simple diffusion. You will learn the full range of jobs the respiratory system performs beyond gas exchange, draw a sharp line between external respiration in the lungs and internal respiration inside body cells, and connect all of it to something every farmer must watch for: a rising breathing rate, a cough, or a poorly ventilated house that turns a healthy flock into a sick one.

Objectifs

  1. Define respiration
  2. Identify the parts of the respiratory system
  3. Explain the mechanism of gaseous exchange in farm animals
  4. State the functions of the respiratory system
  5. Distinguish between external and internal respiration

Note de cours

A poultry keeper near Ogbomoso packs 500 broilers into a house built for 300 and keeps the side nets shut against thieves. Within days the birds stand panting with open beaks, several are coughing, and growth stalls though the feed has not changed. Nothing is wrong with the ration; what has failed is the air the birds breathe.

Évaluation de la leçon

Félicitations, vous avez terminé la leçon sur Respiratory System. Maintenant que vous avez exploré le concepts et idées clés, il est temps de mettre vos connaissances à lépreuve. Cette section propose une variété de pratiques des questions conçues pour renforcer votre compréhension et vous aider à évaluer votre compréhension de la matière.

Vous rencontrerez un mélange de types de questions, y compris des questions à choix multiple, des questions à réponse courte et des questions de rédaction. Chaque question est soigneusement conçue pour évaluer différents aspects de vos connaissances et de vos compétences en pensée critique.

Utilisez cette section d'évaluation comme une occasion de renforcer votre compréhension du sujet et d'identifier les domaines où vous pourriez avoir besoin d'étudier davantage. Ne soyez pas découragé par les défis que vous rencontrez ; considérez-les plutôt comme des opportunités de croissance et d'amélioration.

  1. Which part of the respiratory system is the actual site of gaseous exchange? A. Trachea B. Bronchus C. Alveolus D. Nostril Answer: C
  2. The mechanical process of moving air into and out of the lungs is called: A. Respiration B. Breathing C. Diffusion D. Rumination Answer: B
  3. During external respiration, oxygen moves from the alveolar air into the blood mainly by: A. Osmosis B. Active transport C. Diffusion D. Filtration Answer: C
  4. Which of the following best describes internal (cellular) respiration? A. Exchange of gases between alveolar air and blood B. Movement of air into and out of the lungs C. Release of energy from food inside body cells using oxygen D. Filtering of dust by the nostrils Answer: C
  5. A farmer notices his broilers panting heavily and several coughing in an overcrowded, poorly ventilated house. This is most likely a sign of: A. Normal digestion B. A respiratory problem linked to poor ventilation C. Healthy growth D. Excess appetite Answer: B

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Questions précédentes

Vous vous demandez à quoi ressemblent les questions passées sur ce sujet ? Voici plusieurs questions sur Respiratory System des années précédentes.

WAEC SSCE - Animal Husbandry - 2017

Question 1 Rapport

(a) State four functions of carbohydrates in farm animals.

(b) List four organs associated with respiration in farm animals.

(c) Mention two diseases that affects the respiratory system of farm animals

(d) Define the fol-lowing terms as used in animal physiology: (i) exhalation (ii) inhalation (iii) peristalsis (iv) ovulation (v) rumination.

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