Answer:
True
Step-by-step explanation:
- First line refers tp the physical and chemical barriers of our body, skinn, mucus, tears, stomach acids, etc.
- Second line is the non-specific immune responses, this line is formed by macrophages, neutrophils, etc
- Third line is the specific immune responses done by the T Cells and B Cells, cells with memory.
I hope you find this information useful and interesting! Good luck!