Which part of the body contains the heart and lungs?

Nasa scientists must work together to make sure that everything is correct and accounted for when launching a shuttle. besides a physicist, what other type of scientist would be in making sure that the shuttle has the appropriate type and amount of fuel to reach its destination?

Aperson with age is more likely to catch diseases that healthy people usually don’t catch. what are these infections called?

Which enzymes break down carbohydrates?