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| hi:development-of-gastrointestinal-tract [2023/06/08 10:56] – brahmantra | hi:development-of-gastrointestinal-tract [] () – - () 127.0.0.1 | ||
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| - | ===== Gastrointestinal tract ===== | ||
| - | * Foregut | ||
| - | * Midgut | ||
| - | * Hindgut | ||
| - | |||
| - | | Anal membrane | ||
| - | | Anterior intestinal portal | ||
| - | | Branchial cleft | | | | ||
| - | | Bucconasal membrane | ||
| - | | Buccopharyngeal membrane | ||
| - | | Caecal saccules | ||
| - | | Caecul bud | अंधनाल कलिका | ||
| - | | Cloacal membrane | ||
| - | | Cystic bud | पित्ताशय कलिका | ||
| - | | Dorsal mesogastrium | ||
| - | | Foregut | ||
| - | | Hepatic bud | यकृत कलिका | ||
| - | | Hepatic sinusoids | ||
| - | | Hindgut | ||
| - | | Jejunoileal coils | | | | ||
| - | | Midgut | ||
| - | | Pharyngeal arches | ||
| - | | Pharyngeal cleft | ग्रसनी विदर | ||
| - | | Pharyngeal pouches | ||
| - | | Postarterial midgut | ||
| - | | Posterior intestinal portal | ||
| - | | Prearterial midgut | ||
| - | | Labio gingival sulcus | ||
| - | | Lingual swelling | ||
| - | | Ventral mesogastrium | ||
| - | | Vitellointestinal duct | पीतकान्त्र वाहिका | ||
| - | | Tracheobronchial diverticulum | ||
| - | | Tracheoesophageal septum | ||
| - | | Thyroglossal duct | अवटुजिह्व वाहिका | ||
| - | | Respiratory primordia | ||
| - | | Proctodaeum - ectodermal anal pit | | | | ||
| - | | Primitive gut | आद्य आशय | ||
| - | | Primitive anorectal canal | आद्य गुदामलाशय नली | ||
| - | | Primitive rectum | ||
| - | | Pancreatic buds | अग्न्याशय कालिका | ||
| - | |||
| - | |||
| - | |||
| - | * Primitive tubular gut | ||
| - | * buccopharyngeal membrane ( cephalic end ) | ||
| - | * primitive mouth cavity or stomodaeum | ||
| - | * Foregut | ||
| - | * cephalic or pharyngeal part of foregut | ||
| - | * funnel shaped expansion compressed dorsoventrally | ||
| - | * dorsal wall or roof | ||
| - | * notochord | ||
| - | * hindbrain | ||
| - | * pair of dorsal aorta | ||
| - | * ventral wall or floor | ||
| - | * ectodermal stomodaeum | ||
| - | * forward bulging of pericardial sac | ||
| - | * developing heart | ||
| - | * septum transversum | ||
| - | * two lateral walls | ||
| - | * separated from overlying surface ectoderm by | ||
| - | * splanchnic mesoderm | ||
| - | * undergoes segmentation | ||
| - | * mesodermal bars / branchial or visceral arches | ||
| - | * Each arch contains | ||
| - | * surface ectoderm | ||
| - | * core of mesoderm | ||
| - | * inner lining of pharyngeal endoderm | ||
| - | * extends ventrally and medially | ||
| - | * along floor or ventral wall of pharynx | ||
| - | * meets the corresponding arch of opposite side | ||
| - | * Between each arch | ||
| - | * closely approximated membranes | ||
| - | * in fishes they rupture | ||
| - | * in terrestrial | ||
| - | * series of ectodermal grooves called branchial or visceral cleft / ectodermal cleft | ||
| - | * same on inner side endodermal pouches / pharyngeal pouches are formed | ||
| - | * FIRST POUCH | ||
| - | * dorsal part extends in to mesenchyme outwards | ||
| - | * medial part of this recess persists as auditory tube | ||
| - | * lateral part forms primitive tympanic cavity | ||
| - | * mucous lining of tympanic cavity | ||
| - | * mastoid antrum , mastoid air cells | ||
| - | * mucous layer of tympanic membrane | ||
| - | * the thin layer of mesoderm between First pouch and first cleft | ||
| - | * this region forms tympanic membrane ( tridermal in nature ) | ||
| - | * SECOND POUCH | ||
| - | * THIRD POUCH | ||
| - | * FOURTH POUCH | ||
| - | * Floor of primitive pharynx | ||
| - | * developing tongue | ||
| - | * thyroid diverticulum | ||
| - | * laryngo-tracheal groove | ||
| - | * FIFTH POUCH | ||
| - | * FIRST ARCH ( श - स - ष ) ectoderm | ||
| - | * श - | ||
| - | * forms skin over the | ||
| - | * upper jaw , lower jaw and tragus of auricle | ||
| - | * स - | ||
| - | * Artery - first aortic arch which disappears | ||
| - | * Nerve - | ||
| - | * pre trematic accompanies caudal border or preceeding arch | ||
| - | * Chorda Tympani nerve | ||
| - | * post trematic follows cephalic border of succeeding arch | ||
| - | * Mandibular nerve | ||
| - | * Muscle | ||
| - | * Tensor tympani , tensor veli palatini | ||
| - | * Muscles of Mastication , Mylohyoid | ||
| - | * Anterior belly of digastric | ||
| - | * Skeletal - | ||
| - | * central axis of mesodermal core is chondrified | ||
| - | * cartilaginous bar is enveloped by perichondrium | ||
| - | * dorsal maxillary process | ||
| - | * Ventral Mandibular process ( called as meckel' | ||
| - | * dorsal part ossified to form | ||
| - | * malleus and incus | ||
| - | * ascending part regresses | ||
| - | * fibrous part persists as | ||
| - | * anterior ligament of malleus | ||
| - | * sphenomandibular ligament | ||
| - | * fibrous part is ossified to form | ||
| - | * body of mandible | ||
| - | * from mandibular foramen to mental foramen | ||
| - | * SECOND ARCH | ||
| - | * S - | ||
| - | * Muscle - | ||
| - | * Stapedius , stylohyoid , | ||
| - | * Platysma , posterior belly of digastric | ||
| - | * Auricular , epicranius | ||
| - | * Skeletal - | ||
| - | * Cartilaginous bar is called as reichert' | ||
| - | * dorsal part of cartilage ossified to form | ||
| - | * stapes | ||
| - | * succeeding part forms | ||
| - | * styloid process of temporal bone , stylohyoid ligament | ||
| - | * Ventral part is converted | ||
| - | * lesser cornu | ||
| - | * upper part of body of hyoid bone | ||
| - | * THIRD ARCH | ||
| - | * S | ||
| - | * muscle | ||
| - | * stylopharyngeus | ||
| - | * skeletal - | ||
| - | * cartilaginous bar | ||
| - | * dorsal part dissapears | ||
| - | * ventral part is ossified | ||
| - | * greater cornu of hyoid bone and lower part of hyoid bone | ||
| - | * | ||
| - | * FOURTH ARCH | ||
| - | * S | ||
| - | * muscle | ||
| - | * cricothyroid | ||
| - | * Skeletal | ||
| - | * cartilaginous bar | ||
| - | * dorsal part dissapears | ||
| - | * Ventral part forms lamina of thyroid cartilage | ||
| - | * FIFTH ARCH | ||
| - | * DISSAPEARS | ||
| - | * SIXTH ARCH | ||
| - | * S | ||
| - | * muscle | ||
| - | * all intrinsic muscles except cricothyroid | ||
| - | * Skeletal | ||
| - | * Cartilaginous bar | ||
| - | * Dorsal part dissappears | ||
| - | * Ventral part forms cricoid and arytenoid cartilage | ||
| - | * Anterior intestinal portal | ||
| - | * termination of bile duct in second part of duodenum | ||
| - | * Midgut | ||
| - | * posterior intestinal portal | ||
| - | * Hindgut | ||
| - | * cloacal membrane (caudal end) | ||