Match the following systems to their functions:
A) Skeletal
B) Nervous
C) Integumentary
D) Muscular
1) Directly causes mechanical motion.
2) Responds to environmental changes by transmitting electrical impulses.
3) Provides support and levers for muscles to work on.
4) Protects underlying organs from mechanical damage and synthesizes vitamin D.
1. D) Muscular
2. B) Nervous
3. A) Skeletal
4. C) Integumentary
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