How The Immune System ACTUALLY Works – IMMUNE

Summary by Krater

This video explains the intricate defense mechanisms of the human immune system when a pathogen invades through a wound, detailing the roles of macrophages, neutrophils, complement proteins, dendritic cells, helper T cells, and B cells.

From the video

Answers: How does the human immune system fight off bacteria when you get a cut?

• immune system response
• macrophages
• neutrophils
• complement proteins
• dendritic cells
• helper T cells
• B cells
• antibodies

What it concludes

• Macrophages are large cells that can engulf and digest up to 100 bacteria before becoming exhausted.
• Neutrophils are short-lived suicidal cells that arrive in large numbers to destroy bacteria by releasing toxic chemicals and nets made of DNA.
• Complement proteins are automated liquid weapons that stun and kill bacteria by ripping holes into them.
• Dendritic cells collect bacteria samples from the battlefield and travel to lymph nodes to find the correct helper T cell.
• Helper T cells activate and clone themselves to support macrophages and B cells in fighting the infection.
• B cells produce and pump out up to 2,000 antibodies per second to neutralize bacteria and clear the infection.