that Holozoic nutrition is followed by human beings . we take nutrition in given processes :-   Ingestion ⇒ digestion ⇒ ABSORPTION ⇒ assimilation ⇒ egestion .the long tube that extends from mouth to anus is called as gut also known as alimentary canal .        it comprises of different organs which forms an organ system called as digestive system . like -    buccal cavity :-  ingestion ↓      mouth  - intake of food                                     teeth   - grinding and chewing       tongue - mastication      salivary glands - wetting of food for SWALLOWING .          Oesophagus - transfer of food from buccal cavity to mouth  digestion ↓      stomach   -  gastric gland secretes HCL that makes the medium acidic absorption ↓  assimilation ↓      small intestine - breakdown the complex nutritional molecules .                            - the villi are RICHLY supplied by the blood and lymph vessels that take nutrients to targeted TISSUE through blood .                           egestion ↓large intestine -  absorbs excess water and regulates STOOL consistency and aids  .