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Stomach cancer occur when cancer cell from in the lining of the stomach…
Stomach cancer occur when cancer cell from in the lining of the stomach
Symptoms
Severe, indigestion that is always present
Unexplained persistent nausea
persistent vomiting
stomach pain
Severe persistent heart burn
Causes
Being overweight or obese
A diet high in smocked, pickled or salty foods
Stomach surgery for an ulcer
Epstein-Barr virus infection
Exposure to asbestos
The anatomy of digestive tract
Mouth
Breaks up food particles
Pharynx
Swallows
Esophagus
Transports food
Stomach
Stores and chums food pepsin digest protein, HCI activates enzymes, breaks up food, kills germs.
Liver
Breaks down and builds up many biological molecules stores vitamins and iron
Gallbladder
Stores and concentrates bile.
Pancreas
Hormones regulate blood glucose levels bicarbonates neutralize stomach acid, trypsin and chymotrypsin digest proteins,
Large intestine
Reabsorbs some water and ions
Small intestine
Completes digestion, mucus protects gut wall absorbs nutrients, most water, peptidase proteins, sucrases digest sugars, amylase digests polysaccharides
Rectum
Stores and expels Feces
Anus
Opening for elimination of feces
The basic nutrients needed by the human body
Vitamins
Regulate body processes and support normal body system function
Minerals
Regulate body processes, essential for proper cellular function and comprise body tissue
Protein
Indispensable for tissue formation, cell reparation and hormone and enzyme production . it is vital for building strong muscle and healthy immune system
Carbohydrates
Supply a ready source of energy for the body and provide structural constituents for the formation of cell.
Fat
Provides stored energy for the body, functions as structural mechanisms of cells and also as signaling molecules for suitable cellular communication.
Water
Transports vital nutrients to all body parts, transports waste products for disposal and regulates with body temperature maintenance.
Physiology of digestive system
Ingestion
The process of taking in food
Secretion
The process of producing and releasing chemicals that aid in digestion
Digestion
The breakdown of nutrients into component that can be absorbed into body
Absorption
The process of nutrients being taking into blood and carried to tissue and cells
Excertion
The removal of waste
Major digestive enzymes
Carbohydrate digestion
Saliviary amylase, Pancreatic amylase and meltase
Produced in salivary gland, pancreas and small intestine
Site of release in mouth and small intestine
Protein digestion
Pepsin, trypsin and peptidases
They produced in gastric gland, pancreas and small intestine
Site of release stomach and small intestine
Nucleic acid digestion
Nuclease and nucleosidases
They both produced in pancreas
site of release in small intestine
Fat digestion
Lipase
Produced in pancreas
Site of releases in small intestine