When dissecting the digestive system of poultry (specimen A) and the lungs of catfish (specimen B), you can identify the following organs related to each specimen:
Specimen A: Digestive System of Poultry
- Beak - The structure used for picking up food.
- Crop - A pouch where food is stored and softened before digestion.
- Proventriculus - The glandular stomach that secretes digestive enzymes and acids.
- Gizzard - A muscular organ that grinds food, often containing stones for this purpose.
- Intestines - The long tube where further digestion and nutrient absorption occurs.
Specimen B: Lungs of Catfish
- Swim Bladder - Though not a lung per se, it serves a similar function in buoyancy and can facilitate gas exchange.
- Gill filaments - The structures that extract oxygen from water.
- Gill arches - Support structures that provide support to the gill filaments.
- Bronchi - The main passages that lead from the gills to the surrounding water or to the swim bladder (in some species).
- Alveoli - Tiny air sacs involved in gas exchange (if lungs are present in certain species of fish, although catfish predominantly utilize gills for respiration).
These organs reflect the adaptations of each organism for their respective digestive and respiratory processes.