The immune system is designed to defend the body against invaders that include microorganisms, parasites, cancer cells, and transplanted organs and tissues. 1  The immune system defends against disease and infection via physical barriers, white blood cells, antibodies, complement proteins, and certain organs.
Today, the average cost of throwing birthday parties for children until the age of 21 is Â£19,425 - more than a luxury car or chartering a private jet. â¢ Why a lavish party is the easiest way to ruin your child's birthday.he poll of 2,000 parents, commissioned by Asda, revealed the true cost of children's parties as almost half of parents (48 per cent) spend up to Â£500 on their child's birthday celebration each year.
The average household will spend $978 in 2014 to dance the night away. That's a 14 percent decrease from 2013, when families spent $1,139 on clothes, limousine rentals, tickets and dinner, but still 21 percent higher than in 2011, when the average cost was $807.[ READ: How to Go to Prom on a Budget ].n certain parts of the country â in states such as California, Washington and Oregon â the average cost of prom can get as high as $1,125, the survey found. The Northeast also had similar reported costs, at $1,104. Midwestern and Southern families plan to spend the least, at $835 and $926, respectively.