Chap9_2401 - Chapter 9 1 JOINTS Chapter 9 Anatomy and...

Info iconThis preview shows pages 1–6. Sign up to view the full content.

View Full Document Right Arrow Icon
C h a p t e r 9 1 JOINTS Chapter 9 Anatomy and Physiology Lecture
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
C h a p t e r 9 2 JOINTS (Bones are too rigid to bend without causing damage.) (Bones are held together at joints by flexible connective tissue.) (Imagine how a cast over the knee prevents flexibility.) Articulation (Joint) is a point of contact between bones, between cartilage and bone, or between teeth and bones. Arthrology - Scientific study of joints. *The joints structure determines how it functions. (Some joints permit no movement, others permit slight movement, and still others afford considerable movement.) *The looser the fit, the greater the movement. *Loosely fitted joints are prone to dislocation. CLASSIFICATION OF JOINTS 1. Structural classification 2. Functional classification 1. Structural Classification 1. Fibrous Joints 2. Cartilaginous Joints
Background image of page 2
C h a p t e r 9 3 3. Synovial Joints Structural classification of joints are based on: a. The presence or absence of a synovial (joint) cavity ( a space between the articulating bones); and b. The kind of connective tissue that binds the bones together. Structurally joints are classified as: a. Fibrous - In which there is no joint cavity and bones are held together by fibrous connective tissue ; b. Cartilaginous - In which there is no joint cavity and the bones are held together by cartilage and c. Synovial - In which there is a joint cavity and the bones forming the joint are united by a surrounding articular capsule and frequently by accessory ligaments. 2. Functional classification Takes into account the degree of movement they permit. Joints are classified as: A. Synarthroses is an immovable joint. B. Amphiathroses is a slightly movable joint. C. Diarthroses is a freely movable joint. A. Synarthrosis (immovable joint) -Lack a synovial cavity. -Articulating bones held closely together by fibrous connective tissue. -Permit little or no movement. Three types of (synarthrosis)
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
C h a p t e r 9 4 1. Suture 2. Gomphosis 3. Synchondrosis 1. Sutures A fibrous joint composed of a thin layer of dense fibrous connective tissue; -Unites the bones of the skull -Found between bones of the skull -United by a thin layer of dense fibrous connective tissue (Irregular (interdigitated) structure gives them added strength and decreases chances of fractures). -Functionally classified as Synarthroses (are immovable). 2. Gomphosis To bolt together. -A fibrous joint in which a cone-shaped pegfits into a socket. -Found in articulation of the roots of the teeth with the alveoli (sockets) of the Maxillae and mandible. 3. Synchondrosis A cartilaginous joint in which the connecting material is hyaline cartilage. -Joint between the rib and the sternum -Epiphyseal plate *Is a temporary joint since it is eventually replaced by bone
Background image of page 4
C h a p t e r 9 5 when growth ceases. B.
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 6
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 03/10/2012 for the course BIOL 2403 taught by Professor Campbell during the Spring '12 term at Texas Pan American.

Page1 / 14

Chap9_2401 - Chapter 9 1 JOINTS Chapter 9 Anatomy and...

This preview shows document pages 1 - 6. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online