Human Anatomy and Histology · MU Plovdiv

45. Liver – size, position, description. Peritoneal connection of the liver. Morphological characteristic. Blood supply and nerves of the liver. Intra-and extrahepatic biliary ducts. The gall bladder.

Inside: 24 sections · 16 labelled pictures · 25 flashcards · 11 min

Topic 45 of 138 in the MU Plovdiv syllabus for Human Anatomy and Histology (Dental Medicine, Year 1). The free AceMed note covers it in 24 sections, about 1,420 words (11 min of reading), with 25 flashcards.

In this note

  1. LIVER
  2. External features:
  3. Segmintation:
  4. Diphamatic surface:
  5. Supply: ( depends on the functional division of the liver ).
  6. Visceral surface:
  7. Posterior surface ( from right to the left)
  8. Inferior surface
  9. Fixation:
  10. Innervation:
  11. Functions:
  12. Histology:
  13. Introduction
  14. Basic Architecture
  15. The Capsule
  16. The Parenchyma
  17. Organization: Lobules & Acini
  18. The Lobules
  19. The Hepatic Acinus (Acinus of Rappaport)
  20. Key Structures
  21. The Portal Tract
  22. The Central Vein
  23. Parenchyma
  24. Hepatocytes

LIVER

We don't feel its weight → because its very well attached to the body by different ligaments

  • Largest visceral organ
  • Largest gland in the body
  • Weight 1,5 _ 1,8 Kg without blood

with blood 2,5 Kg

  • Site: Occupies mainly the righ hypochondrium, and epigastrium extending to left hypochondrium

External features:

  • Surfaces of the liver include:
  1. Diphramatic surface: in the anterior, superior and posterior
  2. Visceral surface: inferior

Segmintation:

Lobes (lobi)

  • are marked by grooves on the visceral surface
  1. Right lobe (lobus dexter) – on the right side of the left sagittal fissure
  2. Left lobe (lobus sinister) – on the left side of the left sagittal fissure
  3. Quadrate lobe (lobus quadratus) – below the porta hepatis
  4. Caudate lobe (lobus caudatus) – above the porta hepatis

Segments (segmenta)

  • are divided by the branching pattern of the blood vessels and biliary tree
  • the inner segmentation does not correlate with the pattern of lobes as seen from the surface
  1. I Posterior segment – caudate lobe (segmentum posterius)
  2. II Left posterior lateral segment (segmentum posterius laterale sinistrum)
  3. III Left anterior lateral segment (segmentum anterius laterale sinistrum)
  4. IV Left medial segment (segmentum mediale sinistrum)
  5. V Right anterior medial segment (segmentum anterius mediale dextrum)
  6. VI Right anterior lateral segment (segmentum anterius laterale dextrum)
  7. VII Right posterior lateral segment (segmentum posterius laterale dextrum)
  8. VIII Right posterior medial segment

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