Immunity Introduction When it comes to the immune system, two words that are most important are antigens and antibodies. To put it simply, antigens are any foreign bodies or toxins that initiate an immune response in the body. Antibodies are proteins produced by the body to fight against these antigens. Let us just assume our body’s immune system and its response as an interesting drama that plays as long as we live. Now, certainly, it should have some main characters without which the drama never unfolds. White blood cells (WBC) , also known as leukocytes are the key factors or main characters that help build and maintain a strong immune system in our body. They circulate through the blood vessels and lymphatic vessels and do a constant patrol every time so that our body is always ready to fight any foreign body. WBCs are mainly 2 types: Phagocytes Lymphocytes Phagocytes As the name suggests, these cells engulf and absorb the pathogens, just like that! Remember the terms Neutrophils
A LEAP YEAR comes around approximately once every 4 years; however, the leap year is special beyond the fact that it’s a rare occurrence. There are plenty of trivia tidbits and facts surrounding leap year that make this extra day extra special. And, it’s also a great opportunity to take part in some fun activities with your kids. Read on for ways to enjoy February 29 to the fullest with your family. The Reason behind the Leap Year Every leap year features an extra day added to the end of February, giving February 29 days instead of the usual 28. This bonus day happens because there isn’t actually 365 days in a year, but rather 365.242190 days. To compensate for this extra time, an extra day needs to be added approximately every four years. Interesting Trivia about Leap Years Here are some interesting trivia tidbits about leap years: If you’re born on February 29, you’re known as a “leaper” or a “leapling.” These are uncommon nicknames, indeed, since only people born on th