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Questions and Answers
What is the main role of the appendicular skeleton?
What is the main role of the appendicular skeleton?
- Provide the body with mobility (correct)
- Manufacture blood cells
- Protect the internal organs from injury
- Give shape and support to the body
How many bones does the adult skeleton have?
How many bones does the adult skeleton have?
- More than 206
- Less than 206
- 206 (correct)
- Depends on individual's age
What is the primary function of the skeletal system?
What is the primary function of the skeletal system?
- Support (correct)
- Production of movements by muscles
- Mineral storage
- Blood cell production
What contributes to the strength of bone?
What contributes to the strength of bone?
Which part of the body does the axial skeleton mainly protect?
Which part of the body does the axial skeleton mainly protect?
What does red bone marrow manufacture?
What does red bone marrow manufacture?
What type of bone consists mainly of adipose cells?
What type of bone consists mainly of adipose cells?
Which type of bone appears as a solid mass?
Which type of bone appears as a solid mass?
What type of bones are tough and heavy, taking 80% of the weight of the skeleton?
What type of bones are tough and heavy, taking 80% of the weight of the skeleton?
Which type of bone is generally thin and composed of two nearly parallel plates of compact bone enclosing a layer of spongy bone?
Which type of bone is generally thin and composed of two nearly parallel plates of compact bone enclosing a layer of spongy bone?
Which bones protect organs in the thorax and afford considerable protection for muscle attachment?
Which bones protect organs in the thorax and afford considerable protection for muscle attachment?
Which type of bones cannot be grouped into any of the previously described categories and often vary in the amounts of spongy and compact bone they contain?
Which type of bones cannot be grouped into any of the previously described categories and often vary in the amounts of spongy and compact bone they contain?
Where does bone marrow occupy the marrow cavity in long and short bones?
Where does bone marrow occupy the marrow cavity in long and short bones?
At birth, what is the marrow of all the bones of the body?
At birth, what is the marrow of all the bones of the body?
What do sesamoid bones develop in certain tendons that cross the ends of long bones in the limbs protect tendons from?
What do sesamoid bones develop in certain tendons that cross the ends of long bones in the limbs protect tendons from?
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Study Notes
Appendicular Skeleton
- The main role of the appendicular skeleton is to facilitate movement and support the body's appendages (limbs).
Axial Skeleton
- The axial skeleton mainly protects the central nervous system, including the brain and spinal cord.
Skeletal System
- The primary function of the skeletal system is to provide support, protection, and movement for the body.
Bone Structure
- Bone strength is contributed by the combination of organic and inorganic components.
- Compact bones are dense and tough, making up 80% of the skeleton's weight.
- Cancellous (spongy) bones are lightweight and porous, composed mainly of adipose cells.
- Compact bones appear as solid masses.
- Flat bones are thin and composed of two nearly parallel plates of compact bone enclosing a layer of spongy bone.
Bone Marrow
- Red bone marrow manufactures blood cells.
- At birth, the marrow of all bones is red and functional, gradually becoming inactive in certain bones with age.
Other Bone Types
- Irregular bones cannot be categorized into any specific type, varying in amounts of spongy and compact bone.
- Sesamoid bones develop in certain tendons that cross the ends of long bones in the limbs, protecting tendons from friction and wear.
Bone Cavities
- Bone marrow occupies the marrow cavity in long and short bones.
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