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Questions and Answers
The skeletal system contains 206 separate bones.
The skeletal system contains 206 separate bones.
True
The skeletal system is made up of more than 210 bones.
The skeletal system is made up of more than 210 bones.
False
All bones in the skeletal system are connected to each other.
All bones in the skeletal system are connected to each other.
False
The skeletal system provides structure to the body.
The skeletal system provides structure to the body.
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Bones in the skeletal system are flexible.
Bones in the skeletal system are flexible.
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The axial skeleton contains 82 bones.
The axial skeleton contains 82 bones.
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The skull is composed of 22 bones.
The skull is composed of 22 bones.
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The thoracic cage includes 24 ribs and the sternum.
The thoracic cage includes 24 ribs and the sternum.
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The axial skeleton does not include any associated bones.
The axial skeleton does not include any associated bones.
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There are 7 auditory ossicles in the axial skeleton.
There are 7 auditory ossicles in the axial skeleton.
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The vertebral column consists of 26 bones.
The vertebral column consists of 26 bones.
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The appendicular skeleton includes bones of the skull.
The appendicular skeleton includes bones of the skull.
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Bones of the pectoral girdle help attach limbs to the trunk.
Bones of the pectoral girdle help attach limbs to the trunk.
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There are more bones in the appendicular skeleton than in the vertebral column.
There are more bones in the appendicular skeleton than in the vertebral column.
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The pelvic girdle is part of the axial skeleton.
The pelvic girdle is part of the axial skeleton.
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Each lower limb has 31 bones.
Each lower limb has 31 bones.
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The axial division of the skeleton does not support or protect any organ systems.
The axial division of the skeleton does not support or protect any organ systems.
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The axial division includes the brain and spinal cavities.
The axial division includes the brain and spinal cavities.
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The ventral body cavities are not included in the function of the axial division.
The ventral body cavities are not included in the function of the axial division.
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The axial division creates a framework for the upper limbs.
The axial division creates a framework for the upper limbs.
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Each lower limb contains a femur, tibia, and fibula.
Each lower limb contains a femur, tibia, and fibula.
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There are 5 tarsal bones in each lower limb.
There are 5 tarsal bones in each lower limb.
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The lower limb includes 14 phalanges.
The lower limb includes 14 phalanges.
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The patella is considered a tarsal bone.
The patella is considered a tarsal bone.
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Each lower limb has 5 metatarsal bones.
Each lower limb has 5 metatarsal bones.
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The mandible forms the upper jaw.
The mandible forms the upper jaw.
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The upper limbs consist of the pectoral girdle and limb bones.
The upper limbs consist of the pectoral girdle and limb bones.
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Clavicle and scapula are part of the limb bones in the upper limbs.
Clavicle and scapula are part of the limb bones in the upper limbs.
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Each upper limb contains the humerus, radius, and ulnae.
Each upper limb contains the humerus, radius, and ulnae.
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The appendicular division consists only of the lower limbs.
The appendicular division consists only of the lower limbs.
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Study Notes
Skeletal System
- Contains 206 bones
- Includes bones, cartilages, joints, ligaments, and connective tissues
- Has five primary functions: support, storage (calcium, phosphate, energy), blood cell production, and protection
- Bones are supporting connective tissue with specialized cells and a matrix of extracellular protein fibers and ground substance
- Bones have four general shapes: long (femur), short (ankle), flat (frontal), irregular (vertebra), sesamoid (patella)
- Bone structure types: compact (solid) and spongy (cancellous)
- Bone cells include osteocytes, osteoclasts, and osteoblasts
Bone Growth and Maintenance
- Requires calcium and phosphate absorption and transport
- Needs vitamins D, A, C
- Hormones are involved, including growth hormone, thyroid hormone, sex hormones, parathyroid hormone, and calcitonin
- Bone fractures heal in 4 stages if the periosteum and endosteum are intact:
- Fracture hematoma formation
- Internal and external callus formation
- Osteoblasts replace cartilage with spongy bone
- Spongy bone remodeling (can take 4 months to a year)
Skeletal Divisions
- Divided into axial and appendicular
- Axial skeleton (80 bones) forms the body's longitudinal axis
- Skull (22 + 7 associated bones)
- Thoracic cage (24 ribs and sternum)
- Vertebral column (26 bones)
- Appendicular skeleton (126 bones) includes bones of the limbs and girdles
- Upper limbs: pectoral girdle + limb bones (humerus, radius, ulna, 8 carpal, 5 metacarpal, 14 phalanges)
- Lower limbs: pelvic girdle + limb bones (femur, tibia, fibula, 7 tarsal, 5 metatarsal, 14 phalanges)
Skull
- Composed of 22 bones: 8 cranial and 14 facial
- Cranial bones (8): frontal, parietal (2), temporal (2), occipital
- Cranial bones are connected by immovable sutures
- Facial bones (14) form the face
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Description
This quiz covers the fundamental aspects of the skeletal system, including the types of bones, their functions, and the process of bone growth and maintenance. Explore essential concepts such as bone structure, cell types, and the healing process of fractures.
