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Across 2. Complex network of nerves and cells responsible for transmitting signals between different parts of the body 6. System responsible for the production of offspring and perpetuation of species 9. Delivers oxygen and nutrients to cells while removing waste products 10. Body's defense mechanism against pathogens, infections, and diseases 11. System responsible for transporting blood, nutrients, gases, and waste products throughout the body 12. System responsible for the exchange of oxygen and carbon dioxide in the body

Down 1. System consisting of muscles that enable movement, support, and heat generation in the body 3. Body system comprising the skin, hair, and nails, serving as a protective barrier 4. Framework of bones providing support, protection, and movement for the body 5. Network of glands that produce and secrete hormones regulating various bodily functions 7. Process by which the body breaks down food into nutrients for absorption 8. Network of vessels and organs that regulates body fluids