Worked example 8 — a cut finger
Point 3 of 9 — Lesson 3: Mechanism of the Immune System (Lines of Defense & Humoral/Cellular Immunity)Question bank: 21 questions (21 with pictures)
03 Worked example 8 — a cut finger
- You cut your finger on a dirty knife.
- (1) The skin barrier is broken; bacteria enter.
- (2) Mast cells release histamine; vessels widen – the finger turns red and warm.
- (3) Fluid leaks – it swells.
- (4) Neutrophils and macrophages arrive and engulf bacteria; pus may form from dead cells.
- All this is non-specific and begins within minutes.
📝 Question bank for this point
21 questions linked to this point only, 21 of them with pictures.