Your circulatory system is how your oxygen-rich blood flows from your heart through your body, washing over all your vital organs, then returning oxygen-poor blood to your heart.

The heart is a unidirectional pump. Valves are present to prevent the backflow of blood. This unidirectional flow of blood through the heart shows that mammals have a double circulatory system ...

Learn about the circulatory system with these interactive learning resources for KS2 Science students aged 7-11 from BBC Bitesize.

CD BioSciences Announces Comprehensive Circulatory System Tissue Microarrays CD BioSciences, a US-based biotechnology company focusing on the development of imaging technologies, is pleased to ...