Animal Husbandry - Senior Secondary 1 - Parts, organs, and functions in farm animals

TERM: 1^ST TERM

WEEK THREE

Class: Senior Secondary School 1

Age: 15 years

Duration: 40 minutes of 5 periods each

Date:

Subject: ANIMAL HUSBANDRY

Topic: PARTS, ORGANS AND FUNCTIONS IN FARM ANIMALS

SPECIFIC OBJECTIVES: At the end of the lesson, pupils should be able to

I.) Identify different parts and organs of farm animals

II.) Discuss the functions Digestive systems, Respiratory system, Nervous systems, Circulatory systems.

INSTRUCTIONAL TECHNIQUES: Identification, explanation, questions and answers, demonstration, videos from source

INSTRUCTIONAL MATERIALS: Videos, loud speaker, textbook, pictures,

INSTRUCTIONAL PROCEDURES

PERIOD 1-2

NOTE

PARTS, ORGANS AND FUNCTIONS IN FARM ANIMALS

Digestive System

The digestive system of farm animals is responsible for the breakdown of ingested food into nutrients that can be absorbed and utilized by the body. It comprises several organs, including:

1. Mouth: The mouth is the entry point for food intake. It contains teeth (in some species), which aid in chewing and grinding food, and salivary glands that secrete saliva to moisten and initiate the digestion of carbohydrates.
2. Esophagus: The esophagus is a muscular tube that transports food from the mouth to the stomach through a process called peristalsis.
3. Stomach: The stomach is a large organ where food is further broken down by gastric juices containing acids and enzymes. Ruminants have a complex stomach consisting of four compartments: rumen, reticulum, omasum, and abomasum.
4. Small Intestine: The small intestine is where most of the digestion and absorption of nutrients occur. It consists of three segments: duodenum, jejunum, and ileum.
5. Large Intestine: The large intestine is primarily involved in the absorption of water and electrolytes, as well as the formation and storage of feces before elimination. It includes the cecum, colon, and rectum.

Respiratory System

The respiratory system is responsible for the exchange of gases, primarily oxygen and carbon dioxide, between the body and the external environment.  Major organs and structures include:

1. Nose and Nasal Passages: The nose and nasal passages filter, humidify, and warm the air before it reaches the lungs.
2. Trachea (Windpipe): The trachea is a tube that carries air from the nose and mouth to the lungs.
3. Lungs:The lungs are the primary organs of respiration where gas exchange takes place. They consist of bronchi, bronchioles, and alveoli, where oxygen is absorbed into the bloodstream and carbon dioxide is released.

Nervous System

The nervous system controls and coordinates the functions of farm animals by transmitting electrical impulses between various parts of the body. It comprises two main components:

1. Central Nervous System (CNS): The CNS includes the brain and spinal cord. The brain processes sensory information, regulates behavior, and controls voluntary and involuntary actions. The spinal cord serves as a pathway for nerve impulses between the brain and the rest of the body.
2. Peripheral Nervous System (PNS): The PNS consists of nerves that extend from the CNS to the limbs and organs. It transmits sensory information from the body to the brain and coordinates motor responses.

Circulatory System

The circulatory system, also known as the cardiovascular system, transports oxygen, nutrients, hormones, and waste products throughout the body. Key components include:

1. Heart: The heart is a muscular organ that pumps blood through a network of blood vessels. It consists of four chambers: two atria and two ventricles.
2. Blood Vessels: Blood vessels form a network of arteries, veins, and capillaries that carry blood to and from the heart and various tissues and organs.
3. Blood: Blood is a fluid connective tissue composed of plasma, red blood cells (erythrocytes), white blood cells (leukocytes), and platelets. It carries oxygen from the lungs to tissues, transports nutrients, removes waste products, and plays a crucial role in immune defense and clotting.

EVALUATION: 1. Identify 4 part/organs responsible for the digestion of food in farm animals.

2. What is the essence of respiration in farm animals(mention 5 organs that aid respiration)
3. What is circulatory system?

CLASSWORK: As in evaluation

CONCLUSION: The teacher commends the students positively