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, you will recover from your infection.
NHFactor completely and then place the factors in the proper location on the grid.
4y2 + 25y + 6
Answer:
The heart beat's 80 times a minute, about 115,000 times in one day or 42 million times in a year
Explanation:
I think the answer it's C
