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Topics in Depth

The Immune System

Kicking the Bad Guys OutIt's payday. You're standing in line at the bank, minding your own business and finally cashing in on your meager paycheck. Maybe you'll buy a snazzy jacket with glittery bu...

The Endocrine System

Communications of YoreIt's your first junior high dance. The DJ is blasting Justin Beiber, and the gym is decorated to a "Love Under the Sea" theme. Puffer fish and coral hang from the ceilings, an...

The Nervous System

It's ElectricAs the captain of a space ship, you've been put in charge of exploring the final frontier. After an enjoyable lunch of astronaut macaroni and cheese, an alien aircraft materializes out...

Fitting It All Together

The Puzzle of Life Science would be a whole lot easier if each system minded its own business. Sorry, they don't. They are all up in each other's business, but they mean well.  In fact, these...

Common Mistakes

The Immune System The immune system is really complicated, we know. There's a lot to keep track of: how cells kill invaders, how antibodies work in the adaptive immune system, all those signaling c...

Test Your Knowledge

The Immune System1) List three differences between B and T cells.2) Vaccination is an example of what type of immunity?a. Artificial active immunityb. Natural active immunityc. Artificial passive i...

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