When Steve cut his hand, his
line of defense was broken.
NextReset
2 answers:
The second line of defence is a group of cells, tissues and organs that work together to protect the body. This is the immune system.
When a pathogen (disease-causing organism) invades the body, the neutrophils gather at the entry site and try to engulf it and destroy it.
A T helper cell will recognise only one pathogen. If the T helper cell recognises the invader, it will immediately clone to increase numbers.
After a few days of fighting off the pathogen, he will recover from the infection.
Hey there, first line of defense was broken.~Top♥
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