Questions with the keyword 'system'

• when we look at diagrams of the solar system, the planets are all in line, as though they are on a plate. Is it like by cai192546 and 1 other. to Sara, Amy, Drew, Julia, Kimberley Comments: (No comments so far )
• why is it called the immune system??? by eviej26 to Amy, Drew, Julia, Kimberley, Sara Comments: (No comments so far )
• Why can our immune system deal with some infections but not with others? by rachelmcguinness to Amy Comments: (so far, 2s comments )
• why is pluto no longer down as a planet in the solar systhem? by catherinemaguire and 5 others. to Amy, Drew, Julia, Kimberley, Sara Comments: (No comments so far )