The digestive system of pigeon is well developed and includes an alimentary canal and the digestive glands. Alimentary Canal: The alimentary canal of pigeon (Fig. 26.28) is long, tubular and coiled. It comprises mouth, buccal cavity, pharynx, oesophagus, stomach, small intestine and large intestine which opens to the exterior by cloacal aperture. All the segments of alimentary canal fall into [...]
The coelom of birds (pigeon) is well developed and divided into two cavities, anterior thoracic and posterior abdominal cavities, by a membranous oblique septum or diaphragm. The thoracic cavity has two dorso-lateral pleural cavities, each enclosing a lung. The two pleural cavities are separated from each other by the antero-ventral pericardial cavity enclosing the heart lying in the middle between [...]
The pigeon, like other vertebrates, has receptors or sense organs for touch, smell, taste, sight and hearing which are stimulated by the environment. These sense organs are termed external receptors or exteroceptors. The pigeon possesses following exteroceptors: 1. Tactile Organs: These are poorly developed in birds due to feathery covering of the body. Tactile organs of pigeon remain confined to [...]