The amount of that a food contains is measured in calories.
Calories in food are actually measured in kilocalories, so 1000 actual calories for every 1 Calorie listed
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.
Eat foods that are easily digestible and high in fiber
Well you haven't provided any answer options so answer options include things like mountain climbing. Mountain climbing involves multiple systems and functions over a long period, with moderate being something like hiking the same mountain.
