IB Sports, exercise and health science Topic B.1.2.2 Articulations and the Structural Basis of Joint Movement Revision Notes (SL/HL)

IB Sports, exercise and health science Topic B.1.2.2 Articulations and the Structural Basis of Joint Movement Revision Notes (SL/HL) | RevisionDojo

Written by official IB examiners

Articulations

Definition

Articulation

An articulation (joint) is the connection between two or more bones that allows varying degrees of movement, depending on its type and structure.

An articulation, commonly known as a joint, is the point where two or more bones meet.
Joints play a crucial role in the skeletal system, facilitating movement, providing structural support, and maintaining stability.
Joints can be classified based on their structure (how bones are connected) and function (how much movement they allow).
Some articulations are highly mobile (e.g., shoulder joint), while others allow little or no movement (e.g., skull sutures).

Articulations provide movement and stability

Joints serve two primary functions:

Movement: They enable bones to move relative to one another, allowing a wide range of motions essential for activities such as walking, running, and grasping objects.
Stability: Joints hold bones together, providing structural integrity to the skeletal system and preventing excessive movement that could lead to dislocation or injury.

Note

While all articulations serve a structural purpose, not all are designed for movement.
Some joints are completely immobile and exist solely to provide strength and protection (e.g., the sutures of the skull).

Joint components enable movement and stability

Joints are made up of various structures that allow movement and provide stability:

Bones: The rigid structures forming the joint.
Cartilage: A flexible, smooth tissue that cushions bones and reduces friction.
Ligaments: Tough, fibrous connective tissue that holds bones together.
Synovial Fluid: A lubricating fluid found in synovial joints, which reduces friction and absorbs shock.

Analogy

A joint can be compared to a door hinge. Some hinges are rigid, some allow slight flexibility, and others allow free movement.

Articulations are classified by structure and movement

Joint Type	Structure	Movement Allowed
Fibrous Joints	Bones joined by dense fibrous connective tissue	No or very limited movement
Cartilaginous Joints	Bones connected by cartilage	Limited movement
Synovial Joints	Bones separated by a fluid-filled joint cavity	Free movement

1. Fibrous Joints

Fibrous joints consist of dense fibrous connective tissue.
They contain no joint cavity and allow little to no movement.

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Note

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Tip

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Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris.
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Articulations

Definition

Articulation

An articulation (joint) is the connection between two or more bones that allows varying degrees of movement, depending on its type and structure.

An articulation, commonly known as a joint, is the point where two or more bones meet.
Joints play a crucial role in the skeletal system, facilitating movement, providing structural support, and maintaining stability.
Joints can be classified based on their structure (how bones are connected) and function (how much movement they allow).
Some articulations are highly mobile (e.g., shoulder joint), while others allow little or no movement (e.g., skull sutures).

Articulations provide movement and stability

Joints serve two primary functions:

Movement: They enable bones to move relative to one another, allowing a wide range of motions essential for activities such as walking, running, and grasping objects.
Stability: Joints hold bones together, providing structural integrity to the skeletal system and preventing excessive movement that could lead to dislocation or injury.

Note

While all articulations serve a structural purpose, not all are designed for movement.
Some joints are completely immobile and exist solely to provide strength and protection (e.g., the sutures of the skull).

Joint components enable movement and stability

Joints are made up of various structures that allow movement and provide stability:

Bones: The rigid structures forming the joint.
Cartilage: A flexible, smooth tissue that cushions bones and reduces friction.
Ligaments: Tough, fibrous connective tissue that holds bones together.
Synovial Fluid: A lubricating fluid found in synovial joints, which reduces friction and absorbs shock.

Analogy

A joint can be compared to a door hinge. Some hinges are rigid, some allow slight flexibility, and others allow free movement.

Articulations are classified by structure and movement

Joint Type	Structure	Movement Allowed
Fibrous Joints	Bones joined by dense fibrous connective tissue	No or very limited movement
Cartilaginous Joints	Bones connected by cartilage	Limited movement
Synovial Joints	Bones separated by a fluid-filled joint cavity	Free movement

1. Fibrous Joints

Fibrous joints consist of dense fibrous connective tissue.
They contain no joint cavity and allow little to no movement.

Definition

Paywall

(on a website) an arrangement whereby access is restricted to users who have paid to subscribe to the site.

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Duis aute irure dolor in reprehenderit

Note

Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam quis nostrud exercitation.

Excepteur sint occaecat cupidatat non proident

Tip

Lorem ipsum dolor sit amet, consectetur adipiscing elit.
Sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris.
Duis aute irure dolor in reprehenderit in voluptate velit esse cillum.

A.1 Communication3 subtopics

A.2 Hydration and nutrition3 subtopics

A.3 Response3 subtopics

B.1 Generating movement in the body4 subtopics

B.2 Forces, motion and movement3 subtopics

B.3 Injury2 subtopics

C.1 Individual differences2 subtopics

C.2 Motor learning2 subtopics

C.3 Motivation3 subtopics

C.4 Stress and coping2 subtopics

C.5 Psychological skills2 subtopics

IB Sports, exercise and health science B.1.2.2 Articulations and the Structural Basis of Joint Movement Notes

A.1 Communication3 subtopics

A.2 Hydration and nutrition3 subtopics

A.3 Response3 subtopics

B.1 Generating movement in the body4 subtopics

B.2 Forces, motion and movement3 subtopics

B.3 Injury2 subtopics

C.1 Individual differences2 subtopics

C.2 Motor learning2 subtopics

C.3 Motivation3 subtopics

C.4 Stress and coping2 subtopics

C.5 Psychological skills2 subtopics

Articulations

Articulations provide movement and stability

Joint components enable movement and stability

Articulations are classified by structure and movement

1. Fibrous Joints

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Duis aute irure dolor in reprehenderit

Excepteur sint occaecat cupidatat non proident

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Articulations

Articulations provide movement and stability

Joint components enable movement and stability

Articulations are classified by structure and movement

1. Fibrous Joints

anim nostrud sit dolore minim proident quis fugiat velit et eiusmod nulla quis nulla mollit dolor sunt culpa aliqua

Duis aute irure dolor in reprehenderit

Excepteur sint occaecat cupidatat non proident

Unlock the rest of this chapter with a free account