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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?
Which of the following is NOT a function of the skeletal system?
Which of the following is NOT a function of the skeletal system?
What is the primary function of bones in terms of movement?
What is the primary function of bones in terms of movement?
What is the function of the bone marrow in some bones?
What is the function of the bone marrow in some bones?
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Which of the following is a type of bone cell?
Which of the following is a type of bone cell?
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What is the function of bones in terms of protection?
What is the function of bones in terms of protection?
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What is the function of the skeletal system in terms of storage?
What is the function of the skeletal system in terms of storage?
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What is the primary function of the skeletal system in terms of blood cell formation?
What is the primary function of the skeletal system in terms of blood cell formation?
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What is the primary function of osteoclasts?
What is the primary function of osteoclasts?
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What is the name of the process by which the matrix hardens?
What is the name of the process by which the matrix hardens?
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What type of bone is heavy and dense?
What type of bone is heavy and dense?
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What is the name of the bony spicules found in cancellous bone?
What is the name of the bony spicules found in cancellous bone?
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What is the purpose of canaliculi?
What is the purpose of canaliculi?
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What type of bone is found at the ends of long bones?
What type of bone is found at the ends of long bones?
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What is the name of the process by which osteoblasts get trapped in the bone matrix?
What is the name of the process by which osteoblasts get trapped in the bone matrix?
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What is the function of osteoblasts?
What is the function of osteoblasts?
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What is the primary function of compact bone?
What is the primary function of compact bone?
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What is the characteristic feature of Haversian systems?
What is the characteristic feature of Haversian systems?
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What is the purpose of canaliculi in compact bone?
What is the purpose of canaliculi in compact bone?
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Which type of bone is characterized by its light weight and storage of bone marrow?
Which type of bone is characterized by its light weight and storage of bone marrow?
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What is the term for the central canal that contains blood vessels, lymph vessels, and nerves in compact bone?
What is the term for the central canal that contains blood vessels, lymph vessels, and nerves in compact bone?
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What is the shape of the layers of bone in a Haversian system?
What is the shape of the layers of bone in a Haversian system?
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What is the primary function of the periosteum?
What is the primary function of the periosteum?
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What is the function of osteocytes in compact bone?
What is the function of osteocytes in compact bone?
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What is the term for bones that are shaped like cubes or marshmallows?
What is the term for bones that are shaped like cubes or marshmallows?
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Which of the following types of bones is characterized by being lighter and hollow?
Which of the following types of bones is characterized by being lighter and hollow?
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What is the main function of osteoclasts?
What is the main function of osteoclasts?
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What is the primary function of the endosteum?
What is the primary function of the endosteum?
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What type of bone cells are trapped in the bony matrix called lacunae?
What type of bone cells are trapped in the bony matrix called lacunae?
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What is the primary function of the epiphyseal plates?
What is the primary function of the epiphyseal plates?
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What type of marrow is primarily responsible for blood cell production?
What type of marrow is primarily responsible for blood cell production?
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What is the primary function of the diaphysis?
What is the primary function of the diaphysis?
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What is the primary function of osteoclasts in bone remodeling?
What is the primary function of osteoclasts in bone remodeling?
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Which type of bone is characterized by a network of bony spicules called trabeculae?
Which type of bone is characterized by a network of bony spicules called trabeculae?
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What is the function of the epiphyseal plates in long bones?
What is the function of the epiphyseal plates in long bones?
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Which of the following is a function of the periosteum?
Which of the following is a function of the periosteum?
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What is the function of the red marrow in long bones?
What is the function of the red marrow in long bones?
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Which type of bone is found in the shaft of long bones and the outside layer of all bones?
Which type of bone is found in the shaft of long bones and the outside layer of all bones?
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What is the function of the endosteum in long bones?
What is the function of the endosteum in long bones?
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What is the function of osteoblasts in bone remodeling?
What is the function of osteoblasts in bone remodeling?
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Study Notes
The Skeletal System
- The skeletal system is a framework of bones that support and protect the soft tissues of the body.
Functions of the Skeletal System
- Support: provides a strong frame that supports the body and gives it shape.
- Protection: protects delicate vital organs and tissues by surrounding them partially or completely (e.g., skull protects brain, ribs protect heart).
- Movement (leverage): bones act as levers for muscles, allowing muscles to move joints.
- Blood cell formation: occurs in the bone marrow of some bones.
- Storage of minerals: bones act as a mineral bank, storing calcium and phosphorus.
Bone Cells
- Osteoblasts: cells that form the matrix of bone through a process called ossification.
- Osteocytes: mature osteoblasts trapped in the bony matrix called lacunae, can revert back to osteoblasts if needed.
- Osteoclasts: cells that break down and reabsorb bone tissue, used to remodel bone that is not needed.
Bone Structure
- Two main types of bone:
- Cancellous (Spongy) Bone: light, spongey, and strong, found in the ends of long bones and surrounding the medullary cavity.
- Cortical (Compact) Bone: heavy, dense, and strong, makes up the shaft of long bones and the outer layer of all bones.
Long Bones
- Consist of:
- Epiphysis: contains red marrow and epiphyseal plates, site of bone growth.
- Diaphysis: main section of long bone, weight-bearing.
- Epiphyseal Plates: sites of bone growth, weak and prone to fracture in young animals.
- Medullary cavities: contain red and yellow marrow.
- Red Marrow: site of blood cell production.
- Yellow Marrow: site of fat storage.
Bone Membranes
- Periosteum: membrane covering the outer surfaces of bones (except articular/joint surfaces), contains blood vessels, nerves, and cells for bone growth, remodeling, and repair.
- Endosteum: membrane lining the hollow interior surface of bones, contains cells involved in bone growth, remodeling, and repair.
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Description
This quiz covers the basics of the skeletal system, including its main functions, different bone cells, and the structure of a typical long bone.