Anatomy Bones and Muscles · MU Pleven

111. System of the inferior vena cava

Covers the inferior vena cava, the body's largest vein, which lacks valves and drains blood from below the diaphragm; it lists the visceral tributaries such as the hepatic, renal, suprarenal and gonadal veins, and the parietal tributaries including the lumbar veins and common iliac veins. It then describes the pelvic veins: the external and internal iliac veins with their tributaries, shown in a table, and the common iliac veins, with a labelled picture of the vessel.

Inside: 2 sections · 1 labelled picture · 1 table · 11 flashcards · 2 min

Topic 110 of 236 in the MU Pleven syllabus for Anatomy Bones and Muscles (Medicine, Year 2). The free AceMed note covers it in 2 sections, about 245 words (2 min of reading), with 11 flashcards.

In this note

  1. IVC
  2. PELVIC VEINS

IVC

  • Is the largest vein in the human body.
  • No valves.

Function: Collects deoxygenated blood from the inferior half of the body (below the diaphragm)

Visceral tributaries :-

  • Hepatic veins (3) (Right, intermediate & left).
  • R. Suprarenal vein
  • R. Renal vein
  • L. Renal vein ← L. Suprarenal v. ; L. Ovarian / Testicular v.
  • R. Ovarian / Testicular v.

Parietal Tributaries:

  • (4) Pairs of lumbar veins. → communicate with: - External / Internal vertebral venous plexuses (to drain spinal cord) - Ascending lumbar veins.
  • Inferior phrenic vein.
  • R. common iliac vein + L. Common iliac vein → L4 - L5
  • Inferior Vena Cava
  • Ascends along the right side
  • Passes through the diaphragm at the level of T8 vertebra (through caval opening). together with the phrenic nerve.
  • It opens into the right atrium at the level of 6th right costal cartilage.

PELVIC VEINS

There are 3 main veins:

1. External iliac vein:

  • Continuation of femoral v.

Starts at crossing of inguinal ligament.

Tributaries:

  1. 1. Inferior Epigastric v.
  • Collects blood from anterior abdominal wall.
  • Its peripheral part is doubled
  • Anastmoses from the superior epigastric vein.
  1. 2. Deep circumflex iliac vein:
  • Collects blood from the iliac region and the adjacent abdominal wall.

2. Internal iliac vein:

3. Common iliac vein: CIV

  • internal iliac v. + External iliac v. → sacroiliac joint
  • CIV + CIV → IVC ← no valves

Tributaries:

  1. 1. Ascending lumber v.
  2. 2. Median sacral v. ↳ drain into L.CIV.
  3. 3. Illiolumber v. ↳ or in internal iliac v.

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