Podcast
Questions and Answers
What structural feature of trabeculae allows for strength in a specific direction?
What structural feature of trabeculae allows for strength in a specific direction?
- Trabeculae arrange themselves based on muscle pull. (correct)
- They are filled with osteocytes.
- They have a dense fibrous connective tissue lining.
- The lamellar bone is organized in layers.
Which cell type is responsible for breaking down bone tissue?
Which cell type is responsible for breaking down bone tissue?
- Osteocytes
- Osteoclasts (correct)
- Osteochondral progenitor cells
- Osteoblasts
What is the main function of canaliculi found within the trabeculae?
What is the main function of canaliculi found within the trabeculae?
- To assist in connecting osteocytes. (correct)
- To store fat for energy.
- To facilitate the synthesis of collagen.
- To provide weight support to the bone.
Where is spongy bone located in relation to compact bone?
Where is spongy bone located in relation to compact bone?
What is the primary difference between periosteum and perichondrium?
What is the primary difference between periosteum and perichondrium?
What is the name of the canals that run perpendicular to the length of the bone?
What is the name of the canals that run perpendicular to the length of the bone?
What structure consists of concentric circles of lamellae surrounding a central canal?
What structure consists of concentric circles of lamellae surrounding a central canal?
Which component connects the various layers of lamellar bone within an osteon?
Which component connects the various layers of lamellar bone within an osteon?
How do nutrients and gases move towards osteocytes in compact bone?
How do nutrients and gases move towards osteocytes in compact bone?
What are the circles formed by lamellae around the blood vessels in an osteon called?
What are the circles formed by lamellae around the blood vessels in an osteon called?
What characterizes woven bone tissue?
What characterizes woven bone tissue?
What process leads to the transformation of woven bone into a more organized structure?
What process leads to the transformation of woven bone into a more organized structure?
Which type of bone tissue is characterized by its layered organization?
Which type of bone tissue is characterized by its layered organization?
Spongy bone is also known by which of the following terms?
Spongy bone is also known by which of the following terms?
Which statement is true regarding the composition of spongy bone?
Which statement is true regarding the composition of spongy bone?
What is the primary function of the articular cartilage found at the epiphysis?
What is the primary function of the articular cartilage found at the epiphysis?
What fills the medullary cavity in adults?
What fills the medullary cavity in adults?
What role do osteoblasts and osteoclasts play in bone structure?
What role do osteoblasts and osteoclasts play in bone structure?
What happens to the epiphyseal plate as a person reaches adulthood?
What happens to the epiphyseal plate as a person reaches adulthood?
Where is the periosteum located in relation to the bone structure?
Where is the periosteum located in relation to the bone structure?
Flashcards
Woven Bone
Woven Bone
Bone tissue where collagen fibres are randomly organised around cells. This is the first type of bone formed during embryonic development and bone repair.
Lamellar Bone
Lamellar Bone
Bone tissue where collagen fibres are arranged in organised sheets or layers called lamellae.
Spongy Bone
Spongy Bone
A type of lamellar bone with less bone matrix and more space, giving it a porous appearance.
Compact Bone
Compact Bone
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Bone Remodeling
Bone Remodeling
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Trabecular Bone Structure
Trabecular Bone Structure
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Osteoclasts
Osteoclasts
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Lacunae
Lacunae
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Canaliculi
Canaliculi
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Periosteum
Periosteum
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Epiphysis
Epiphysis
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Diaphysis
Diaphysis
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Metaphysis
Metaphysis
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Articular Cartilage
Articular Cartilage
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Perforating Canals (Volkmann's Canals)
Perforating Canals (Volkmann's Canals)
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Central Canals (Haversian Canals)
Central Canals (Haversian Canals)
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Concentric Lamellae
Concentric Lamellae
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Osteon
Osteon
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Study Notes
Bone Tissue
- Bone tissue is made of different types of bone
- Woven bone: Collagen fibers are randomly arranged. Found in early skeletal development and bone repair.
- Lamellar bone: Collagen fibers are organized into sheets (lamellae). The most common type of bone.
- Spongy bone (Cancellous/Trabecular bone): Less bone matrix, more space. Gives bone its porous appearance. Found inside bones.
- Compact bone (Cortical bone): Dense, few spaces. Forms the outer layer of bones.
Bone Classification
- Spongy bone: Found on the inside of bones.
- Compact bone: Found on the outside of bones, providing strength.
- Trabeculae:Rods or plate-like structures in spongy bone. Aligned with lines of stress.
- Osteocytes: Found in lacunae (spaces); connected to each other via canaliculi.
- Medullary cavity: Space in the shaft of long bones. -Filled with bone marrow (red or yellow).
- Periosteum: Dense fibrous connective tissue covering the outer surface of bones. Two layers (outer fibrous, inner osteogenic).
- Endosteum: Connective tissue lining the inside of bones, esp. medullary cavity. Contains osteoblasts and osteoclasts.
Bone Growth
- Intramembranous ossification: Bone forms directly within a fibrous membrane. Forms some skull bones and clavicle parts.
- Endochondral ossification: Bone forms by replacing hyaline cartilage. Forms most of the skeleton.
Epiphyseal Plate (Growth Plate)
- Found between the epiphysis and diaphysis of long bones.
- Allows for bone length growth.
- Contains cartilage cells that undergo interstitial growth.
- Calcification replaces cartilage.
- Closure: Markers of skeletal maturity.
Bone Remodeling
- Continuous process of bone resorption (osteoclasts) and bone deposition (osteoblasts).
- Resorption removes old bone, deposition creates new.
- Maintains bone strength, mineral homeostasis.
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