The liver continued

HideShow resource information
  • Created by: Steff06
  • Created on: 09-03-16 10:30
View mindmap
  • The liver continued
    • KUPFFER CELLS:
      • Key role is to BREAK DOWN and  RECYCLE old ERYTHROCYTES. Product of this is BILIRUBIN which is EXCRETED as part of bile and in faeces.
    • BILE DUCT:
      • A main function of liver cells is to manufacture BILE. Bile CANALICULI run alongside the sinusoids. These carry bile from centre of LOBULE to outside where it enters a BRANCH of the bile duct.
      • Transports the bile to the GALL BLADDER.
    • STORAGE of NUTRIENTS:
      • Level of nutrients in body need to be controlled so they do not become harmful.
      • Excess GLUCOSE causes OSMOTIC STRESS. Excess IRON can cause iron DEPOSITS in tissues.
      • Excess VITAMIN D can cause elevated CALCIUM levels, ANOREXIA, NAUSEA and KIDNEY FAILURE.
      • Excess VITAMIN A can be fatal.
    • SINUSOIDS: VESSELS within the hepatic portal vein. Sinusoids are adapted for exchange of materials between blood flowing through sinusoids and the HEPATOCYTES.
    • Compared with normal capillaries sinusoids are WIDER and blood flow is SLOWER. Walls are more POROUS and composed of 1 layer of THIN cells.
    • Many pores between cells and there is NO BASEMENT MEMBRANE. Blood flowing through sinusoids is in close contact with surrounding hepatocytes.

Comments

No comments have yet been made

Similar Biology resources:

See all Biology resources »See all Cellular processes resources »