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Questions and Answers
What is the primary function of the skeletal system in terms of support?
What is the primary function of the skeletal system in terms of support?
- Produces blood cells.
- Provides movement for the body.
- Forms the internal framework that supports and anchors all soft organs. (correct)
- Stores important minerals.
Which of the following is NOT a function of the skeletal system?
Which of the following is NOT a function of the skeletal system?
- Protection of internal organs.
- Storage of minerals.
- Production of hormones. (correct)
- Allows movement.
The red bone marrow is responsible for the formation of red blood cells.
The red bone marrow is responsible for the formation of red blood cells.
True (A)
How many bones are in an adult skeleton?
How many bones are in an adult skeleton?
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The long bone is composed of the diaphysis and the ______.
The long bone is composed of the diaphysis and the ______.
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What is hematopoiesis?
What is hematopoiesis?
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What do paranasal sinuses do for the skull?
What do paranasal sinuses do for the skull?
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Sutures are movable joints between cranial bones.
Sutures are movable joints between cranial bones.
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What bone of the skull is the foramen magnum located in?
What bone of the skull is the foramen magnum located in?
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Study Notes
Functions of the Skeletal System
- Provides support for the body, acting as an internal framework for organs.
- Offers protection for internal organs.
- Enables movement through the interaction of skeletal muscles and bones.
- Serves as a storage site for essential minerals (calcium, phosphorus) and fat.
- Facilitates blood cell formation (hematopoiesis) within the red bone marrow.
Classification of Bones
- An adult human skeleton consists of 206 bones, varying in size and shape.
- Long bones are composed of compact and spongy bone, providing strength, structure, and mobility.
Gross Anatomy of the Bone
- The long bone structure includes two main parts: the diaphysis and the epiphysis.
Axial Skeleton
- Formed by 22 bones, including 8 cranial flat bones and 14 facial bones.
- Includes 3 small bones in the middle ear of each side and 1 hyoid bone.
Cranium (8 Bones)
- The cranial bones form the braincase, protecting the brain, eyes, and ears.
Sutures
- Immovable joints between cranial bones.
- Interlocking edges prevent sliding or shifting of bones during impacts or pressure.
Paranasal Sinuses
- Air cavities located in the maxillae, frontal, sphenoid, and ethmoid bones.
- Open into the nasal cavities and lined with ciliated epithelium, continuous with the nasal mucosa.
- Functions:
- Make the skull lighter
- Provide resonance for the voice
Foramen Magnum
- A large oval opening in the occipital bone of the skull.
- Allows passage of the spinal cord from the brain.
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