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Questions and Answers
The skeletal system contains 206 separate bones.
The skeletal system contains 206 separate bones.
True (A)
The skeletal system is made up of more than 210 bones.
The skeletal system is made up of more than 210 bones.
False (B)
All bones in the skeletal system are connected to each other.
All bones in the skeletal system are connected to each other.
False (B)
The skeletal system provides structure to the body.
The skeletal system provides structure to the body.
Bones in the skeletal system are flexible.
Bones in the skeletal system are flexible.
The axial skeleton contains 82 bones.
The axial skeleton contains 82 bones.
The skull is composed of 22 bones.
The skull is composed of 22 bones.
The thoracic cage includes 24 ribs and the sternum.
The thoracic cage includes 24 ribs and the sternum.
The axial skeleton does not include any associated bones.
The axial skeleton does not include any associated bones.
There are 7 auditory ossicles in the axial skeleton.
There are 7 auditory ossicles in the axial skeleton.
The vertebral column consists of 26 bones.
The vertebral column consists of 26 bones.
The appendicular skeleton includes bones of the skull.
The appendicular skeleton includes bones of the skull.
Bones of the pectoral girdle help attach limbs to the trunk.
Bones of the pectoral girdle help attach limbs to the trunk.
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.
The pelvic girdle is part of the axial skeleton.
The pelvic girdle is part of the axial skeleton.
Each lower limb has 31 bones.
Each lower limb has 31 bones.
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.
The axial division includes the brain and spinal cavities.
The axial division includes the brain and spinal cavities.
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.
The axial division creates a framework for the upper limbs.
The axial division creates a framework for the upper limbs.
Each lower limb contains a femur, tibia, and fibula.
Each lower limb contains a femur, tibia, and fibula.
There are 5 tarsal bones in each lower limb.
There are 5 tarsal bones in each lower limb.
The lower limb includes 14 phalanges.
The lower limb includes 14 phalanges.
The patella is considered a tarsal bone.
The patella is considered a tarsal bone.
Each lower limb has 5 metatarsal bones.
Each lower limb has 5 metatarsal bones.
The mandible forms the upper jaw.
The mandible forms the upper jaw.
The upper limbs consist of the pectoral girdle and limb bones.
The upper limbs consist of the pectoral girdle and limb bones.
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.
Each upper limb contains the humerus, radius, and ulnae.
Each upper limb contains the humerus, radius, and ulnae.
The appendicular division consists only of the lower limbs.
The appendicular division consists only of the lower limbs.
Flashcards
Number of bones in the skeletal system
Number of bones in the skeletal system
The human skeletal system is composed of 206 individual bones.
Skeletal system
Skeletal system
The body's framework of bones which provides support and structure.
Separate bones
Separate bones
Individual bones making up the skeletal system.
206 bones
206 bones
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Human skeleton
Human skeleton
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Axial skeleton bones
Axial skeleton bones
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Skull bones
Skull bones
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Auditory ossicles
Auditory ossicles
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Thoracic cage bones
Thoracic cage bones
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Rib count
Rib count
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Vertebral column
Vertebral column
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Appendicular skeleton
Appendicular skeleton
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Pectoral girdle
Pectoral girdle
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Pelvic girdle
Pelvic girdle
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Limbs
Limbs
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Lower limb bones
Lower limb bones
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Axial skeleton function
Axial skeleton function
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Brain protection
Brain protection
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Spinal cord protection
Spinal cord protection
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Ventral body cavities
Ventral body cavities
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Femur
Femur
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Tibia and Fibula
Tibia and Fibula
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Tarsal bones
Tarsal bones
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Metatarsal bones
Metatarsal bones
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Mandible
Mandible
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Appendicular Division
Appendicular Division
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Limb Bones in Each Limb
Limb Bones in Each Limb
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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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