Answer
(a) Pharynx
(b) Esophagus
(c) Liver
(d) Gallbladder
(e) Duodenum
(f) Jejunum
(g) Ileum
(h) Appendix
(i) Mouth
(j) Salivary glands
(k) Stomach
(l) Pancreas
(m) Transverse colon
(n) Ascending colon
(o) Descending colon
(p) Sigmoid colon
(q) Rectum.
Work Step by Step
Mechanisms present to prevent disease at each of these structures are:
All of the gastrointestinal system is lined by epithelial cells that form epithelial tissue which prevents the entry of pathogens into the bloodstream and other tissues.
Mouth: Salivary glands secrete mucus that contains lysozyme.This kills bacteria and antibodies that react with bacteria
Stomach: Low pH
Small intestine: Peristalsis, liver detoxifies toxins, mucus
Large intestine: Normal microbiota
