DIGESTIVE SYSTEM 01

51/2 WEEK EMBRYO: Identify the ESOPHAGUS (3), STOMACH (9), HEPATIC DIVERTICULUM (8), MIDGUT (7), and MESONEPHROS (6) on this dissected human embryo.

DIGESTIVE SYSTEM 02

MIDGUT AT 7 WEEKS. Identify MIDGUT HERNIATION, UMBILICAL CORD, ABDOMINAL CAVITY.

DIGESTIVE SYSTEM 03

MIDGUT HERNIATION AT 7.75 WEEKS.

DIGESTIVE SYSTEM 04

MIDGUT HERNIATION AT 8 WEEKS.

DIGESTIVE SYSTEM 05

CROSS SECTION AT 8 WEEKS. Identify AORTA (1), SPINAL CORD (7), STOMACH (8), LIVER (6), KIDNEY

(5), HERNIATED MIDGUT (4), AMNION, UMBILICAL CORD.

DIGESTIVE SYSTEM 06

UMBILICAL HERNIA: Note the location of the umbilical cord arising from the apex of the hernia.

DIGESTIVE SYSTEM 07

UMBILICAL HERNIA: Identify an umbilical hernia in an older child.

DIGESTIVE SYSTEM 08

OMHPHALOCELE (STILLBORN): Explain the cause of this defect.

DIGESTIVE SYSTEM 09

OMHPHALOCELE (neonate): Explain the cause of this defect. Identify the coverings of the extruded gut.

DIGESTIVE SYSTEM 10

OMPHALOCELE: Note the location of the umbilical cord in omphalocele.

DIGESTIVE SYSTEM 11

GASTROSCHISIS: This 30 minute old neonate has gastroschisis. Distinguish between gastroschisis and

omphalocele in appearance. What is the embryological basis for gastroschisis?

DIGESTIVE SYSTEM 12

GASTROSCHISIS: Note the absence of covering and the location of the umbilical cord in gastroschisis.

DIGESTIVE SYSTEM 13

GASTROSCHISIS: Gastroschisis following vaginal delivery. Note difference between this neonate the neonate

in slides 6 and 7.

DIGESTIVE SYSTEM 14

ANAL ATRESIA (male): Identify anal atresia. What structure failed to develop in this infant?

DIGESTIVE SYSTEM 15

ANAL ATRESIA (female): Identify anal atresia. What structure failed to develop in this infant?

DIGESTIVE SYSTEM 16

CYSTIC FIBROSIS: This liver is from an infant with cystic fibrosis. Note the cystic structures. Why does the liver become involved in this disease?

DIGESTIVE SYSTEM 17

MECONIUM ILEUS: Explain how this lesion may occur is association with cystic fibrosis.