After stomach is one folded tube {small intestine}|, 30 feet long, which absorbs almost all food materials. End sphincter allows material to pass to colon. Intestinal wall secretes enzymes to break up proteins. Glucose and amino acids have active transport into blood. Lymph absorbs fats. Small intestine has peristalsis and churning movements.
Food passes through small intestine eight hours {transit time}.
Small-intestine mucosa has many cytoplasm fingers {villus}, to absorb sugars and salts.
Small intestine attaches to body back wall by connective tissue {mesentery}|.
Fat and connective tissue {omentum}| are in front of intestines.
Connective-tissue membrane {peritoneum}| lines intestines and body cavity holding intestines.
Peritoneum can have bacterial infections {peritonitis}|.
Small intestine has first part {duodenum}|.
Small intestine has second short part {jejunum}|.
Small intestine has long part {ileum}|.
4-Zoology-Organ-Digestion-Parts
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Date Modified: 2022.0225