7- a. Draw two functional diagrams, the first illustrates the path of air
between the balloon and the human
organism, and the second the sense
of the circulation of the coloured
liquid in the fish
b Give a title to every diariram

a "theory" a suggestion that is not 100 % accurate, or a figure. some people say its a theory because they of all the passed theory's about one subject. it depends sometimes theory might be accurate and sometimes they are.

some scientists like gregory adcock agree with thorne's theory of regional continuity.

others, like chris stringer and ian tattersall, believe thorne's results may be contaminated or misinterpreted.