Podcast
Questions and Answers
What is a characteristic that applies to all joints of the body?
What is a characteristic that applies to all joints of the body?
- All joints contain synovial fluid
- All joints are immovable
- All joints are flexible
- All joints are connections between neighboring bones (correct)
Diarthrotic joints are?
Diarthrotic joints are?
freely movable
Synarthrotic joints are?
Synarthrotic joints are?
immovable
Amphiarthrotic joints are?
Amphiarthrotic joints are?
Some joints involve bone ends that are held together by collagen fibers. These joints are classified as ______ joints.
Some joints involve bone ends that are held together by collagen fibers. These joints are classified as ______ joints.
Joints that can be tightly connected, allowing no movement are called ______ joints.
Joints that can be tightly connected, allowing no movement are called ______ joints.
Joints that have bone ends held together by hyaline cartilage or fibrocartilage are classified as ________ joints.
Joints that have bone ends held together by hyaline cartilage or fibrocartilage are classified as ________ joints.
Joints held together by a joint capsule are called ______ joints.
Joints held together by a joint capsule are called ______ joints.
What class of joint consists of bone ends held together by collagenous tissue?
What class of joint consists of bone ends held together by collagenous tissue?
A fibrous joint between bones of the skull is called a _______.
A fibrous joint between bones of the skull is called a _______.
The joint between the distal end of the tibia and fibula is called a ________.
The joint between the distal end of the tibia and fibula is called a ________.
The joint that anchors a tooth in its socket involves the fibrous periodontal ligament. This joint is a ______.
The joint that anchors a tooth in its socket involves the fibrous periodontal ligament. This joint is a ______.
Joints where the bone ends are bound together by hyaline cartilage or fibrocartilage are classified as?
Joints where the bone ends are bound together by hyaline cartilage or fibrocartilage are classified as?
A synovial joint is surrounded by a two-layer _____ which encloses a fluid-filled space called the _________.
A synovial joint is surrounded by a two-layer _____ which encloses a fluid-filled space called the _________.
The outer layer of the joint capsule consists of _____ which is continuous with the periosteum of each bone.
The outer layer of the joint capsule consists of _____ which is continuous with the periosteum of each bone.
The outer layer may be reinforced by______ which are bundles of collagenous fibers.
The outer layer may be reinforced by______ which are bundles of collagenous fibers.
Structures outside the joint capsule are called _____ by definition.
Structures outside the joint capsule are called _____ by definition.
The inner layer of the joint capsule is the _____, consisting of _____ .
The inner layer of the joint capsule is the _____, consisting of _____ .
The inner lining of the joint capsule secretes a fluid called ____. This fluid is viscous and lubricates the surfaces within the joint capsule.
The inner lining of the joint capsule secretes a fluid called ____. This fluid is viscous and lubricates the surfaces within the joint capsule.
Fibrocartilage discs within a joint are called?
Fibrocartilage discs within a joint are called?
What are fluid-filled sacs in joints called?
What are fluid-filled sacs in joints called?
The lining of the joint cavity that secretes fluid is called?
The lining of the joint cavity that secretes fluid is called?
What is the protective layer that covers bone ends called?
What is the protective layer that covers bone ends called?
What type of joint is associated with the presence of a joint capsule?
What type of joint is associated with the presence of a joint capsule?
A joint that consists of two flat bone ends that can slide over each other is called a ____________ joint.
A joint that consists of two flat bone ends that can slide over each other is called a ____________ joint.
Joints classified as ____________ joints have one cylindrical bone end that articulates with a ring made up of another bone and a ligament.
Joints classified as ____________ joints have one cylindrical bone end that articulates with a ring made up of another bone and a ligament.
Joints consisting of the head of one bone fitting into a cup-shaped depression on the other bone are called ball-and-socket joints.
Joints consisting of the head of one bone fitting into a cup-shaped depression on the other bone are called ball-and-socket joints.
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Study Notes
Joint Characteristics
- All joints are connections between neighboring bones.
Types of Joints
- Diarthrotic joints: Freely movable joints, allowing a wide range of motion.
- Synarthrotic joints: Immovable joints, offering no movement.
- Amphiarthrotic joints: Slightly movable joints, providing limited movement.
Joint Classifications Based on Structure
- Fibrous joints: Consist of bone ends held together by collagen fibers; can be classified as:
- Synarthrotic joints: Tightly connected with no movement.
- Amphiarthrotic joints: More loosely connected, allowing slight movement.
- Cartilaginous joints: Bone ends held together by hyaline cartilage or fibrocartilage; classified as amphiarthrotic or slightly movable joints.
- Synovial joints: Bone ends held together by a joint capsule; these joints are freely movable (diarthrotic).
Fibrous Joint Types
- Suture: A fibrous joint between bones of the skull.
- Syndesmosis: Joint occurring between the distal end of the tibia and fibula, connected by a band of collagen.
- Gomphosis: Joint that anchors a tooth in its socket via the fibrous periodontal ligament.
Cartilaginous Joints
- Characterized by bone ends bound together by hyaline or fibrocartilage.
Synovial Joint Structure
- Surrounded by a two-layer joint capsule enclosing a synovial cavity filled with synovial fluid.
- Outer layer: Made of dense connective tissue, continuous with the periosteum, may include ligaments for reinforcement.
- Accessory structures: Include ligaments located outside the capsule.
- Inner layer: Synovial membrane, consisting of loose connective tissue, secretes synovial fluid that lubricates the joint.
Special Features of Synovial Joints
- Menisci: Fibrocartilage discs within the joint, aiding in shock absorption and stability.
- Bursae: Fluid-filled sacs that cushion and reduce friction in the joint.
- Articular cartilage: Protective layer covering the ends of bones within the joint.
Joint Capsule Presence
- Joint capsules are associated exclusively with synovial joints.
Synovial Joint Classifications
- Plane joints: Consist of two flat bone ends allowing gliding movements.
- Pivot joints: Feature one cylindrical bone end that rotates within a ring formed by another bone and a ligament.
- Ball-and-socket joints: Characterized by the head of one bone fitting into a cup-shaped depression of another bone, allowing for a wide range of motion.
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