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DigestiveSystemKhadraMohamed (Gastrointestinal tract (Large intestine…
DigestiveSystemKhadraMohamed
General Function
Breaks down food into small piece enough to absorpe to the circulatory system
Gastrointestinal tract
Stomach
Store food, mechanical digestion= chyme beiging of chimcal disgestion
Parietal cells
Hydrochlonic acid
Chief cells
Secrets pepsinogen
Cardiac sphincter
prevent the acid to reflec form the stomach
Pyloric sphincter
regulating the amount of chyme moving to small instestine
Rugae
increase the storage capasity
Small intestine
Continue mechanical digestion and chemical disgestion, absorption
Circular folds
slow down movment rate, increase absorbation, increase surface are
Villi
Microvilli
Duodenum
Intestinal glands
seceates watery intestinal juce
peyer pathes
collaction of lymphocyte( MALA)
Esophagus
takes food to the stomach
Large intestine
Water and electrolaite absorption
Rectum
Storage place, powerful muscle to expl feces
Anal Canal
mucosa glands
Lubricat
Internal Sphnicter muscle
smooth muscle
External Sphincter muscle
Skeleltal muscle
Cecum
Appendix
Colon
Ascending
Descending
Transvers
Ileocecal valve
Seprate the content of large and small intestine
Anus
the Opening
Speical Features
Teniae Coli
3 strips of longitudinal Muscle they cause the large intestine to pucker into sacs
Haustra
Sacs or large intestine
Epiploic appendages
Fat filled pouches
Mouth
cut up the food
Pharynx
Pertoneum
Slippery serous membranes
Visceral peritonem
Parietal peritoneum
Parotoneal Cavity
the space between the two pertonem membrane
Interapeotoneal Organs
Greater Omentum
Stomach
Mesocolom
Transvers colon and sigmoid colon
Mesentery proper
Jujenum and ileam
Lesser omentum
liver
Retroperitoneal Organs
lack Mesentreies
Duodenum
Ascending colon
Descending colon
Rectum
Pancreas
Mesentrices
Double layer of peritoneum form body wall to the digestive organ
helps in keepings in place, store fat, provides a route for circulation
The accessory digestive organs
Teeth
incisors
canine
Premolars
Molars
Salivary glans
produce saliva
Tongue
Liver
Make bile and store it in gall bladder
filter toxin
Store gulcose glycogen
Process fat and amino acid
makes blood protiens
Pancreas
excocrine gland part secrets and produce more than 22 enzyme and enter the duodenum
Digestion
Mechanical Digestion
Cut the food up to small piece
Segmentation
nonadjacent segments of muscles contract and relax moving food forwand and backward to mix food ans slowly propelled
Peristalsis
adjacent segments of the tube to move food along the trach distaily
Chemical Digestion
Add chemicals( enzymes) to breakdown food
Absorption
Defecation