The Human Circulatory System comprises the heart, blood vessels, blood, lymph, arteries, capillaries and veins. Discover more about circulatory system at BYJU'S
Leeches are blood-sucking annelids that constitute the subclass Hirudinea. They are hermaphrodites with a dorso-ventrally flattened body. Here, let's learn more about the open circulatory system of leeches.
This Circulatory System unit is packed with highly engaging activities, diagrams, foldables, worksheets, circulatory system task cards and more on the circulatory system. This circulatory system unit incorporates a reading passage on the circulatory syst