20 Questions
Which part of the skeleton consists of the skull, vertebrae, ribs, and sternum?
Axial skeleton
How many bones does the human skeleton have at birth?
270
Which part of the spine forms the lower back?
Lumbar
What are the first seven ribs called?
True Ribs
How many bones are fused together to form the coccyx?
4
Which part of the skeleton runs along the sides of the body?
Appendicular skeleton
What is the first bone of the cervical spine called?
Atlas
Which part of the spine connects the spinal column to the pelvic girdle?
Sacrum
What is the function of the bones in the skeleton?
Support
What is the term for the skeleton that is on the outside of the organism?
Exoskeleton
Which of the following is NOT a function of the skeleton?
Production of blood cells
What is the primary job of ligaments?
To prevent dislocation of bones
What is the function of synovial fluid in joints?
To produce lubrication
Which type of joint allows movement in all planes?
Ball and socket joint
What is the function of tendons?
To connect muscle to bone
What is the function of the growth plate in bone growth?
To increase the length of a bone
What is the purpose of the periosteum?
To provide a fibrous coating
What is the composition of compact bone?
Bone cells embedded in a matrix of calcium and phosphorus salts
What is the main component of cartilage?
Collagen fibers
What is the cause of arthritis?
All of the above
Study Notes
Skeletal System Overview
- The skeleton consists of 206 bones that provide support, protection, and movement for the body.
- At birth, the human skeleton has around 300 bones, which fuse together as we grow and develop.
Axial Skeleton
- The axial skeleton consists of the skull, vertebrae, ribs, and sternum.
- The lumbar region of the spine forms the lower back.
- The first seven ribs are called true ribs.
- The coccyx is formed by 3-5 fused vertebrae.
Vertebral Column
- The atlas is the first bone of the cervical spine.
- The sacrum connects the spinal column to the pelvic girdle.
Functions of the Skeleton
- The skeleton provides support, protection, movement, and blood cell production.
- The exoskeleton is the term for the skeleton that is on the outside of the organism.
- The skeleton does not produce hormones.
Connective Tissues
- Ligaments connect bones to each other and provide stability to joints.
- Synovial fluid in joints reduces friction and allows for smooth movement.
- Ball-and-socket joints allow movement in all planes.
Bone Structure and Function
- Tendons connect muscles to bones and facilitate movement.
- The growth plate is responsible for bone growth and development.
- The periosteum is a layer of tissue that covers the bone and allows for bone growth and repair.
- Compact bone is composed of tightly packed osteons.
- Cartilage is composed primarily of collagen and chondroitin sulfate.
Joint Disorders
- Arthritis is caused by inflammation of the joints.
Test your knowledge of the musculoskeletal system with this quiz! Learn about the axial and appendicular skeleton, bones, and more. Challenge yourself and see how much you know about the framework of the human body.
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