favorite resource for heart, blood, circulatory sytem?

[Teresa Hope]

What could you recommend for this study, for fifth grade level? Book, video, website, free downloadable, something you saw in a catalog? Something that's very clear, but also something that talks more broadly about blood pressure, pacemakers, blood donation, etc.

Thanks in advance!

[Alana in Canada]

has some very nice anatomical pictures kids can label. Tough to print without a membership, but doable.

Title page to the whole enchilada: http://www.enchantedlearning.com/subjects/anatomy/titlepage.shtml