04 INTRODUCTION TO SKELETAL SYSTEM AND JOINTS Flashcards
The _________________ works as a support structure for your body. It gives the body its shape, allows movement, makes blood cells, provides protection for organs and stores minerals.
Skeletal System
_________ is the scientific study of bones, practiced by osteologists.
Osteology
The skeletal system is also called the ____________________.
Musculoskeletal system
Functions of the Skeletal System (6)
- Support
- Protection
- Assistance in movement
- Mineral homeostasis
- Blood cell production
- Triglyceride storage
Bone tissue makes up about ____ of the weight of the human body.
Bone tissue makes up about 18% of the weight of the human body.
A bone is an organ made up of several different tissues working together: (6)
Bone (Osseous) tissue
Cartilage
Dense connective tissue
Epithelium
Adipose tissue
Nervous tissue
The ___________is the bone’s shaft or body—the long, cylindrical, main portion of the bone.
diaphysis
The __________ are the proximal and distal ends of the bone.
epiphysis
The _________ are the regions between the diaphysis and the epiphysis.
metaphysis
In a growing bone, each metaphysis contains an __________________, a layer of hyaline cartilage that allows the diaphysis of the bone to grow in length.
epiphyseal (growth) plate
The ______________ is a thin layer of hyaline cartilage covering the part of the epiphysis where the bone forms an articulation (joint) with another bone.
articular cartilage
The ______________is a tough connective tissue sheath and its associated blood supply that surrounds the bone surface wherever it is not covered by articular cartilage.
periosteum
The _________________, is a hollow, cylindrical space within the diaphysis that contains fatty yellow bone marrow and numerous blood vessels in adults.
medullary cavity
Bones of the adult skeleton are grouped into two principal divisions:
Bones of the adult skeleton are grouped into two principal divisions: the axial skeleton and the appendicular skeleton
Types of Bones: Based on Shape (6)
Sutural Bones
Irregular Bones
Short Bones
Flat Bones
Long Bones
Sesamoid Bones
The _________is the entire bony framework of the head, including the lower jaw.
Skull
The __________ is the lower jaw.
mandible
The _____________ is the skull without the mandible.
cranium
The __________________ is the cranium without the face.
calvaria or calvarium
Cranium Bones (8)
- Frontal
- Parietal (2)
- Temporal (2)
- Occipital
- Sphenoid
- Ethmoid
Facial Bones (14)
- Vomer
- Mandible
- Maxilla (2)
- Zygomatic Bone (2)
- Nasal Bone (2)
- Inferior Nasal Concha (2)
- Lacrimal Bone (2)
- Palatine Bone (2)
The _____________________, makes up about two-fifths of your total height and is composed of a series of bones called vertebrae.
The vertebral column, also called the spine, backbone, or spinal column, makes up about two-fifths of your total height and is composed of a series of bones called vertebrae.
The adult vertebral column typically contains _______ vertebrae.
26 vertebrae
__ cervical vertebrae in the neck region.
7 cervical vertebrae
___ thoracic vertebrae posterior to the thoracic cavity.
12 thoracic vertebrae
_____ lumbar vertebrae supporting the lower back.
5 lumbar vertebrae
1 sacrum consisting of ____ fused sacral vertebrae.
One sacrum consisting of five fused sacral vertebrae.
When viewed from the anterior or posterior, a normal adult vertebral column appears ___________.
straight
But when viewed from the side, it shows _____________
Four slight bends called normal curves.
___________________________ (also known as ‘roundback’ or ‘hunchback’) is where the mid-upper spine has an exaggerated curve, which makes the back look more round than usual.
Increased Thoracic Kyphosis
Total number of bones in an ADULT Skeleton?
a. 200
b. 202
c. 204
d. 206
d. 206
________________ is a bone disease that develops when bone mineral density and bone mass decreases, or when the quality or structure of bone changes. This can lead to a decrease in bone strength that can increase the risk of broken bones (fractures).
Osteoporosis
_______________________, characteristically, there is destruction of the intervertebral disk space and the adjacent vertebral bodies, collapse of the spinal elements, and anterior wedging leading to the characteristic angulation and gibbus (palpable deformity because of involvement of multiple vertebrae) formation.
Tuberculosis of the spine
An abnormal lateral curvature of the spine. It is most often diagnosed in childhood or early adolescence. It is most common of the abnormal curves.
Scoliosis
The nucleus pulposus of the intervertebral disc may herniate (protrude) posteriorly or into one of the adjacent vertebral bodies, compressing the spinal nerves and spinal cord
Herniated (Slipped) DisC
Parts of a typical vertebra: (5)
Parts of a typical vertebra: vertebral body, vertebral arch, transverse process, spinous process, articular process (superior and inferior)
Give the Atypical vertebras (5)
Atypical vertebrae: C1, C2, C7, T11, T12
The key difference between typical and atypical vertebrae.
The key difference between typical and atypical vertebrae is that typical vertebrae consist of all basic components of a vertebra while atypical vertebrae are the vertebrae that have modified structure due to their position and function.
_______________ refers to the entire chest region.
Thorax
Thoracic cage – bony
enclosure composed
of: ___, ____, ____.
sternum, ribs and their costal cartilages.
The ____________________, is a flat, narrow bone located in the center of the anterior thoracic wall.
sternum, or breastbone
Sternum measures about _______
15 cm (6 in.)
Sternum is consist of three parts:
- Manubrium
- Xiphoid process
- Body
It gives structural support to the sides of the thoracic cavity
Ribs
How many pairs does the rib have?
a. 14
b.16
c. 12
d. none of the above
c. 12
What are the true ribs?
True ribs (1-7)
What are the false ribs?
False ribs (8-12)
It’s the inflammation of the one or more costal cartilages.
Costochondritis
A ___________________ is a point of contact between two bones, between bone and cartilage, or between bone and teeth.
Joint
A joint is also called an ______________.
an articulation or arthrosis
What do you call a scientific study of joints?
Arthrology
The study of motion of the human body is called ______________.
Kinesiology
TRUE OR FALSE: Functions of joints are based on the structural classification.
TRUE
The structural classification of joints is based on two criteria:
(1) the presence or absence of a space between the articulating bones, called a synovial cavity, and (2) the type of connective tissue that binds the bones together.
Functional Joints (3)
Synarthrosis.
Amphiarthrosis
Diarthrosis
An immovable joint.
Synarthrosis
A slightly movable joint.
Amphiarthrosis
A freely movable joint.
Diarthrosis
Structural Joints
Fibrous joints
Cartilaginous joints
Synovial joints
There is no synovial cavity, and the bones are held together by dense irregular connective tissue that is rich in collagen fibers.
Fibrous joints
There is no synovial cavity, and the bones are held together by cartilage.
Cartilaginous joints
The bones forming the joint have a synovial cavity and are united by the dense irregular connective tissue of an articular capsule, and often by accessory ligaments.
Synovial joints
Movement of Fibrous Joint
Fibrous joints permit little or no movement.
The three types of fibrous joints
- Sutures
- Syndesmoses
- Interosseous membranes
The three types of cartilaginous joints are:
- Synchondrosis
- Symphsis
- Epiphyseal Cartilage
A joint that occur only between bones of the skull.
Suture
What movement does the joint suture permits?
Synarthrosis and Amphiarthrosis
TRUE OR FALSE. In older individuals, sutures are slightly movable (amphiarthroses), but in infants and children they are slightly immovable (synarthroses).
FALSE. In older individuals, sutures are immovable (synarthroses), but in infants and children they are slightly movable (amphiarthroses).
A ________________ is a fibrous joint in which there is a greater distance between the articulating surfaces and more dense irregular connective tissue than in a suture.
Syndesmosis
What movement does the joint Syndesmosis permits?
limited movement (amphiarthroses)
Examples of Syndesmosis
- distal tibiofibular joint
- gomphosis or dentoalveolar joint
A substantial sheet of dense irregular connective tissue that binds neighboring long bones
Interosseous Membrane
What movement does the joint Interosseous Membrane permits?
slight movement (amphiarthrosis)
Examples of Interosseous Membrane
1.radius and ulna
2. tibia and fibula
A __________________ is a cartilaginous joint in which the connecting material is hyaline cartilage.
Synchondrosis
What movement does the joint synchondrosis permits?
slightly movable (amphiarthrosis) to immovable (synarthrosis)
Example of an Synchondrosis
Joint between the first rib and the manubrium of the sternum.
A ____________________ is a cartilaginous joint in which the ends of the articulating bones are covered with hyaline cartilage, but a broad, flat disc of fibrocartilage connects the bones.
Symphsis
What joint occur in the midline of the body?
Symphsis
Example of Symphsis
pubic symphysis
What movement does the joint Symphsis permits?
slightly movable joint (amphiarthrosis)
_________________ are hyaline cartilage growth centers.
Epiphyseal Cartilage
What movement does the joint Epiphyseal Cartilage permits?
not associated with
movement/ immovable joint (synarthrosis)
Example of Epiphyseal Cartilage
Epiphyseal growth
plates
When bone elongation ceases, bone replaces the hyaline cartilage, and becomes a _____________, a bony joint.
Synostosis
All synovial joints are classified functionally as ______________________.
freely movable (diarthroses)
The bones at a synovial joint are covered by a layer of hyaline cartilage called ________________.
articular cartilage
What does synovial joint consist of: (4)
- Articular cartilage
- Articular capsule
- Synovial membrane
- Synovial Fluid
What are the 6 Synovial Joint?
- Plane joint
- Hinge joint
- Pivot joint
- Condyloid joint
- Saddle joint
- Ball-and-socket joint
Articulating surfaces are flat or slightly curved.
Plane Joint
Examples of Plane Joint
~ intercarpal joints
~ intertarsal joints
~ acromioclavicular joints
~ acromioclavicular joints
What movement does the plane joint permits?
back-and-forth, rotation and side-to-side movements
Another term for Hinge Joint
Ginglymus Joint
Another term for Condyloid Joint
Ellipsoidal Joint
Another term for Saddle Joint
Sellar Joint
Another term for Pivot Joint
Trochoid Joint
Another term for ball-and-socket joint
Spheroid Joint
Convex to concave articulation.
Hinge Joint
_________________ produce an angular, opening-and closing motion.
Hinge joint
Examples of Hinge Joint
~ knee
~ elbow
~ ankle
~ interphalangeal joints
The rounded or pointed surface of one bone articulates with a ring formed partly by another bone and partly by a ligament.
Pivot Joint
Examples of Pivot Joint
~ atlanto-axial joint
~ radioulnar joints
What movement does the Pivot Joint permits?
Allows rotation only around its own longitudinal axis.
The convex oval-shaped projection of one bone fits into the oval-shaped depression of another bone.
Condyloid Joint
What movement does the Condyloid Joint permits?
flexion–extension and abduction–adduction, plus limited circumduction
Examples of Condyloid Joint
~ radiocarpal (wrist) joint
~ metacarpophalangeal joints
The articular surface of one bone is saddle-shaped, and the articular surface of the other bone fits into the “saddle” as a sitting rider would sit.
Saddle Joint
What movement does the Saddle Joint permits?
flexion–extension and abduction–adduction, plus limited circumduction
Example of a Saddle Joint
Carpometacarpal joint
Ball-like surface of one bone fitting into a cuplike depression of another bone.
Ball-and-socket Joint
What movement does the Condyloid Joint permits?
flexion–extension, abduction– adduction, and limited circumduction
Examples of Ball-and-socket Joint
~ shoulder and hip joints
Degenerative joint disease in which joint cartilage is gradually lost
Osteoarthritis
“wear and tear” arthritis
Osteoarthritis
What movement does the Ball-and-socket Joint permits?
flexion–extension, abduction– adduction, and rotation