Across
- 1. Heart is located in the _____
- 3. The heart is enclosed in a double-layered sac called
- 5. What is the shape of Erythrocytes.
- 9. ____ do not contain haemoglobin.
- 10. _____ have thicker walls than the receiving chambers.
- 12. _____ is a thick muscular wall present between auricles and ventricles.
Down
- 2. What works tirelessly to keep the heart working throughout the life
- 4. What are colorless, without nuclei.
- 6. _____ are the fine blood vessels connecting arteries with veins
- 7. _____ fluid protects heart from jerks while contraction.
- 8. What is the weight of heart
- 11. Auricles are also called as