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Index
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Crossword
Crossword
Complete the crossword, then click on "Check" to check your answer. If you are stuck, you can click on "Hint" to get a free letter. Click on a number in the grid to see the clue or clues for that number.
Check
Across: 2. They control the atria and ventricles. 6. Capillaries remove this substance from the lungs. 10. The names of arteries when they branch into smaller vessels. 11. The number of parts the circulatory system is divided into.
Down: 1. The type of circulatory system in vertabrates., 3. He discovered the system of vessels. 4. Circulatory system in birds and mammals. 5. The number of chambers of the heart. 6. They conncet the arterial and venous circulatory sub-systems. 7. Where the heart is situated. 8. The vessels that return blood to the heart. 9. The name of the main artery where the blood flows.
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