Grass is chewed by the pre-molar and molar teeth and swallow in to the oesophagus, in the oesophagus, food move like peristalsis until it enters the rumen and recticulum. The food mixes with the saliva and undergoes fermentation by bacteria. The bacteria convert cellulose to a dissacharide. This party digested grass in the rumen and recticulum is moulded in cuds which is later send back to the mouth for chewing is process is known as chewing the cuds or regurgitation. The grass is then reswallow into the oesophagus were it moves by peristalsis into the omasum which acts as a store retaining large particles. While smaller food particles then move to the abomasum were cellulose secreting bacteria.
Some of the glucose is use by the bacteria while the rest goes into the small intestine. It is then absorb into blood capillaries of the villi were the undigested food matter passes into the large intestine were water is absorb and faeces is passed to the rectum were it is temporally stored and later pass out through the anus.
ADAPTATION OF HERBIVORES TO THEIR DIET
- They have a very large intestine that stores and digest food efficiently.
- The presence of the diastema help to separate freshly cut grass from that which is chew.
- The stomach or the caecum or appendix stores bacteria which secrete cells
- They have sharp and chisel-like incisors forcing grass.
- There is a presence of a hard pad which is use for cutting grass
- They have broad and flat premolar and molar for grounding grass
- The presence of a lose joint between the skull and the lower jaw allounce sideward and back, forward and up and downward movement helping it to grand the grass properly.
- The swallowing and sending out of food back of the food to the mouth. Ensure that food is chewed twice to ensure proper granding and digestion of the grass.
ADAPTATION OF CARNIVORS TO THEIR DIET
- Well developed canines for piercing, killing and tearing of prey
- Fast moving to capture prey
- Incisors sharp and pointed for nipping and biting prey
- Powerful peristaltic movement to swallow large chunks of meats
- Well-developed sense of smell to smell prey
- Powerful jaw muscles for gripping prey and for steering
- Relatively short alimentary canal because diet is rich in protein with relatively little indigestible material.
- Carnassial present for tearing flesh
- Fast movement to capture preys.