Class notes
Bio 150 Chapter 9 Lecture Notes
- Course
- BIO 150
- Institution
- Delaware County Community College
This is a comprehensive and detailed note on Chapter 9; Joints.
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WYNTKUChapter 9 - Joints
1. Define the term arthrology.
the study of joint structure, function, and dysfunction
2. Explain what an articulation is when discussing the skeletal system.
any point where two bones meet; form a joint
a. What is always found at an articulation?
hyaline cartilage
3. What are the three structural classifications of joints?
fibrous (subcategories: sutures, gomphosis, syndesmosis)
cartilaginous (ex. between the ribs and the sternum; costal cartilage)
and synovial (ex. between bones that move against each other)
4. What is a suture?
a fibrous joint; immobile or only slightly mobile fibrous joints that closely bind the bones
of the skull to each other; they are nowhere else in the body.
a. Fiber found in a suture?
collagen fibers; binds the plates together
b. Where do you find sutures in the human body?
in the skull only
5. What is a gomphosis?
“bolt” (nail) = gomph
your teeth
periodontal ligaments
a. Where do you find gomphoses?
fibrous joint; anchored within your upper and lower jaw (maxilla and mandible)
b. (From lecture): How do the nerves of the periodontal ligaments help
with chewing? Your brain receives the signals from the periodontal
nerves, and it adjusts the muscle force to reflect the object you're biting
down on. (proprioception)
6. Where are syndesmoses found in the human body?
Syn = together (putting two things together) desm = band
Ex. the INTEROSSEOUS membrane of the antebrachium and crural region
(connects the radius to the ulna and the tibia to the fibula)
a. What type of CT is found here and why is it appropriate?
dense regular connective tissue (collagen)
Differentiate between CT of a syndesmosis vs suture
● collagen strands in syndesmoses are longer compared to sutures where
they are shorter (less movement)
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