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.
Parents spend Â£4,762.66 on average to keep their children entertained throughout the holidays. Researchers found that attraction tickets, toys, computer games and sports activities mean most parents will part with around Â£396 for every month of the year.orries: Nearly half of parents dread the cost of entertaining their children through the summer holidays. If the cost of family holidays is factored in, with the average British family taking two holidays a year, this rises to an average of Â£626.50 a month or a total of Â£7,517.84 a year.