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.
1 For example, eight invitations from Kid's Party World cost about $10. 2  Food and cake for a sweet 16 party typically ranges from $100 for simple snacks and sheet cake for 10 guests to $2,000 or more for catered dinner parties with 50 to 100 guests.elated articles: Wedding DJ, Wedding Caterer, Cake, Quinceanera. 1  A sweet 16 birthday party for a teenage girl can cost $300-$25,000 or more, with options ranging from a casual sleepover party to a formal ball resembling a wedding reception.