in short explain the alimentary canal(digestive system) in human biengs
Alimentary canal is the passage along which food passes for digestion. It is also known as the gastrointestinal tract and extends from mouth to anus.
Parts of alimentary canal from anterior end to posterior end
Buccal Cavity (oral cavity)
Dental formula of adult human −
Enamel forming hard surface of teeth is the hardest substance of human body. It helps in mastication of food.
Tongue − Attaches to floor of buccal cavity by frenulum and bears projections called papillae, which in turn bear taste buds
Oesophagus (food pipe) and trachea (wind pipe) both open into pharynx.
Entry of food into glottis (the opening of trachea) is prevented by epiglottis (a cartilaginous flap).
This thin, long tube leads to stomach.
Gastro-oesophageal sphincter regulates oesophagus opening into stomach.
Location − upper left part of abdominal cavity
Three parts of stomach:
Cardiac − where oesophagus opens
Fundic − where food rests and undergoes digestion
Pyloric − which opens into duodenum
Pyloric sphincter guards opening of stomach into duodenum.
the digestive system or alimentary canal starts from mouth and ends with anus
it is used in digesting the food taken in different stages throughout
many enzymes act on the food we eat to break them into simpler substances to digest easily since the food we take is complex and contains many components like fats, proteins, carbhohydrates,etc
the undigested food is thrown out of the body throgh anus after absorption of required material by the body
last stage of digestion is done in large intestine
digestive system is required for proper usage of the food we take for our body