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.
Answer:
Americans have greater access to Rock Climbing than any other nationality BY FAR
Explanation:
That other answer is BS I have been climbing for 3+ years, and I would now that rock climbing is ridiculously accessible to Americans, I'm Mexican and I climb for the Mexican national youth team and I have several Gold medals for winning 1st place in competitions, and we are all jealous at the almost unnecessary abundance of climbing gyms in the USA, my city has 2,800,000+ population and we have 4 climbing gyms and only 2 local crags, only one of those gyms has sport climbing, thats the one I go to. In the city of San Jose California, there are like 15+ gyms, and in my state there are 19 gyms and the state of California has like 400+ or something crazy like that
