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Digestive System: Definitions Of The Human Body

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Digestive system – *The digestive system is composed of the mouth cavity, oesophagus, stomach, small intestine, colon, and glands. *The mouth cavity is bounded by the upper and lower jaws. *The tongue islong, slender and deeply forked. It has a muscular sheath into which it may retract. The tongue is sensitive and is used as tactile organ. *The oesophagus is thin walled and runs adjacent to the air sac from …show more content…

*The oesophagus opens into a dilated muscular and elongated part called stomach. *The junction between the oesophagus and the stomach is not well marked, and the stomach itself is not very …show more content…

* The wall of the trachea is supported by many tracheal rings.Trachea ends near the heart, where it branches into two bronchi. * The left bronchus leads to the left lung, which is very small or completely vestigial. *In most snakes, the left lung is completely vestigial. *In Boas respiratory system and pythons it is a third of the size of the right lung while in sea snakes the right lung stretches the entire length of the body to aid in buoyancy *The right bronchus leads to the right lung, which is elongated. *The anterior part of the lungs is vascular and functions in gas exchange, but the second half of the lung is nonvascular. *The air sac acts as a hydrostatic function in most snakes. It

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