<span>By performing different stretching exercises targeting multiple areas, one is able to realize long-term flexibility. The exercises depend on the various target muscles and the intensity of the exercises determines the outcome. Moreover multiple muscle exercise like swimming have been noted to improve on flexibility.</span>
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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:
D is the answer
Explanation:
I had to do a test on it :)