Immune Cells and Their Jobs
12th Grade · Science · 40 min
Lesson Preview
Learning Objective
I can describe the roles of different immune cells in fighting infection.
- 1
The innate defense system is the body's first line of defense, which includes physical barriers like skin and mucous membranes.
- 2
Phagocytes, such as neutrophils and macrophages, are cells that ingest and destroy pathogens through a process called phagocytosis.
- 3
Natural killer cells target and kill infected or cancerous cells by inducing apoptosis, which is programmed cell death.
