Bone Basics
This is the largest and longest bone in the human body, located in your thigh.
What is the femur?
This type of muscle tissue makes up your heart and pumps blood throughout your body.
What is cardiac muscle?
This type of joint allows for the most movement and is found in your shoulders and hips.
What is a ball-and-socket joint?
This term describes bending a joint, which decreases the angle between two bones.
What is flexion?
This painful injury happens when you stretch or tear a ligament in a joint.
What is a sprain?
This is the total number of bones found in a normal adult skeleton.
What is 206?
These tough bands of tissue connect your muscles directly to your bones.
What are tendons?
These strong, stretchy bands of tissue connect one bone to another bone to keep a joint stable.
What are ligaments?
This action means moving a limb or body part away from the midline of your body.
What is abduction?
This disease causes bones to become weak and brittle, making them break much easier.
What is osteoporosis?
This soft tissue lives inside your bones and is responsible for making new blood cells.
What is bone marrow?
This is the name of the largest muscle in the human body, located in the buttocks.
What is the gluteus maximus?
This smooth, rubbery tissue covers the ends of bones to reduce friction inside a joint.
What is cartilage?
This muscle works hard to straighten your arm, acting as the main helper when you extend your elbow.
What is the triceps?
This common condition involves painful inflammation and stiffness in one or more joints.
What is arthritis?
These specialized cells are responsible for building and forming new bone tissue.
What are osteoblasts?
Unlike skeletal muscle, this type of muscle is involuntary and lines internal organs like your stomach.
What is smooth muscle?
Your elbow and knee are examples of this type of joint, which moves back and forth like a door.
What is a hinge joint?
This term is used for a muscle that opposes a specific movement, like the biceps relaxing while the triceps contracts.
What is an antagonist?
This injury occurs when a bone is forced completely out of its normal position in a joint.
What is a dislocation?
This part of the skeleton includes the skull, spine, and ribcage, protecting your vital organs.
What is the axial skeleton?
This microscopic structure is the basic unit of a muscle contraction, where filaments slide past each other.
What is a sarcomere?
This clear, thick fluid lubricates your freely movable joints to keep them moving smoothly.
What is synovial fluid?
This special chemical is released by nerves to signal a muscle cell to contract.
What is acetylcholine?
This condition happens when a muscle stays contracted and cannot relax, usually due to a lack of ATP.
What is a muscle cramp?