Anatomy · MU Sofia

Internal Organs+Glands · 68-69. Liver - shape, topography, blood supply, lymphatic drainage, nerve supply.

Covers the liver's size, weight and position, its surfaces and the lobe and segment divisions, followed by the hepatic blood supply, venous and lymphatic drainage. It then describes the posterior and inferior surface impressions, the three fixing ligaments, nerve supply, functions and a brief histology section on lobules, hepatocytes and sinusoids. Functional division into left and right lobes is illustrated with several pictures.

Inside: 12 sections · 9 labelled pictures · 10 flashcards · 6 min

Topic 64 of 264 in the MU Sofia syllabus for Anatomy (Dental Medicine, Year 2). The free AceMed note covers it in 12 sections, about 779 words (6 min of reading), with 10 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:

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. 1. Diphramatic surface : in the anterior, superior and posterior
  2. 2. Visceral surface : inferior

Segmintation:

Lobes (lobi)

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