Ligaments:
Tough bands of tissue that attach bones to each other.
Osteoporosis:
Condition where bones become thin and fragile and are more likely to break.
Nerves (also called Neurons) :
Cells responsible for sending and receiving signals between the body and brain.
Nervous system:
System that receives and interprets sensations (like touches, sounds, and sights), and coordinates activities (like muscle movements) throughout the body.
Receptor:
Molecule on the outside of a cell that receives chemical signals from other parts of the body.
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