The Liver - Basic Human Anatomy - Lecture Slides, Slides for Anatomy
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The Liver - Basic Human Anatomy - Lecture Slides, Slides for Anatomy

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Human Anatomy course teaches a student the structural nature and significance of each of the major organ systems, and how each system carries out its unique role in the living organism. Key points in this lecture are: Th...
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THE LIVER

THE LIVER

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I. Introduction/General Information

A. Largest of viscera

1. ~ 2.5% body weight

2. Completely covered by

Glisson’s Capsule

3. Incomplete covering by

peritoneum

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General Information, continued …

4. Measurements are ~

a. 21 – 23 cm transverse

b. 15 – 18 cm superior

to inferior

c. 10 – 13 cm anterior

to posterior

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General Information, continued …

B. Location:

1. right hypochondrium

2. epigastrium

C. Mostly covered by

ribs

D. Contains numerous

vascular structures

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II. Detailed Anatomy

A. Four lobes

1. Divisions based on blood supply,

bile drainage

2. Anatomical lobes divided

by falciform ligament

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Inferior View of the Liver

A

P

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Detailed Anatomy, con’t…

3. Functional Lobes

a. right and left lobes

separated by

imaginary line

b. from fossa for GB 

IVC

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Right and Left Functional Lobes of the Liver

Right

Lobe

Left

Lobe

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Detailed Anatomy, continued …

B. Functional Divisions

1. Right lobe with caudate process

2. Left lobe:

a. Caudate lobe

b. Quadrate lobe

Caudate

Process

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Detailed Anatomy, continued …

C. Fissures:

1. Right sagittal (main)

2. Left sagittal (accessory)

3. Portal

4. Right oblique intersegmental

5. Lateral intersegmental

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Fissures of the Liver

 Main lobar fissure  Boundary

between R and L lobes  L.S. on U/S: seen

as hyperechoic line from PV to neck of GB

 Used to ID GB when it is packed with stones

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Fissures of the Liver

 Portal fissure

 T.S. on U/S

 Created by portal

veins (triads)

 R. main PV is //

to anterior body

wall

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Segments of the Liver

 Hepatic segments

 I = caudate lobe

 II & III = superior and

inferior lateral

segments, L. lobe

 IV = medial segment,

L. lobe

 V & VI = caudal to

transverse plane

 VII & VIII = cephalad

to transverse plane

I

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Functional divisions, continued …

4. Fossae (Superficial)

a. IVC – posterior

b. Portal Vein – inferior

c. Gallbladder – inferior

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Fossae, Inferior Surface of the Liver

 Fossa for IVC

 Fossa for

Portal Vein

 Fossa for Gall

Bladder

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Functional Divisions, continued …

5. Impressions (visceral surface):

produced by abdominal viscera

a. Gastric (fundus of stomach) b. Renal (right kidney)

c. Adrenal (right adrenal gland)

d. Duodenal (bulb of duodenum)

e. Esophageal (esophagus)

f. Right and left colic (flexures of

the colon)

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Visceral Impressions, continued …

•Esophageal

•Renal

•Gastric

•Adrenal

•Duodenal

•Right colic

•Left colic

L

P

R

A

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Detailed Anatomy, continued …

D. Ligaments

1. Falciform (most superficial anteriorly)

a. Divides left lobe in two sections

1. anatomical left lobe 2. caudate & quadrate lobes

b. Two layers of peritoneum

c. Extends to umbilicus

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Ligaments, continued …

2. Ligamentum teres hepatis

(fetal source??)

3. Ligamentum venosum

(fetal source??)

4. Right/Left Coronary Ligaments

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Hepatic Ligaments

 Falciform ligament

 L. coronary ligament

 L. triangular ligament

 Ligamentum teres

hepatis

 Ligamentum

venosum

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Ligaments, continued …

5. Hepatophrenic & Hepatorenal

ligaments:

a. Subdivisions of right

coronary ligament

b. hepatophrenic (superior)

& hepatorenal (inferior)

c. Surround BARE AREA

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Hepatic Ligaments, con’t…

 Hepatophrenic

ligament

 Hepatorenal

ligament

Bare Area

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Detailed Anatomy, continued …

E. Lesser Omentum

1. Sleeve-like structure

2. Connects lesser curvature of

stomach & bulb of duodenum to

inferior surface of liver

3. AKA: Gastrohepatic or

Hepatoduodenal ligament

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Lesser Omentum, continued …

3. Attachment surrounds Porta Hepatis

4. Continues on each side of ligamentum

venosum

5. Extends to caudate & left lobes

on posterior surface of liver

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