Vascular

Question 1

Red infacts (where occur, how are they caused in these sites)

Answer 1

Lungs, liver, gut
Causes - venous occlusion, loose spongy tissue, congested tissue, dual circulation, re-established flow

Question 2

White infacts (where occur and what causes in these sites)

Answer 2

Kidney, heart, spleen
Causes - arterial occlusions, end artery supply, tissue density limits spread of blood from adjacent tissue

Question 3

Thrombi
a) Problems
b) Venous thrombi
c) Arterial thrombi

Answer 3

a) Can occlude the vessel, cause infarction. Can embolise and cause infarction elsewhere. Can propagate. Can cause infection
b) Macroscopically - pale head with long red tail. Microscopically - little lamination
c) Macroscopically - very pale as mostly fibrin and platelets. Microscopically - has clear lamination (lines of Zahn - pale = fibrin and platelets, darker = more RBCs)