Skeletal System Flashcards
Two types of skeleton
Axial Skeleton and Appendicular
How many bones in Axial & list the main bones
Made up of 80 Bones Head and trunk of vertebrate Central axis of human skeleton Supports the upright position and protects internal organs Skull, vertebrate, rib cage, and sternum
How many bones in Appendicular & list the main bones
Made up of 126 Bones
Portion of the skeleton of vertebrates made up of bones that support appendages
Limbs
Aid in the movement of the body
Pectoral girdle, arms, forearms, hands, pelvis, legs, feet, and ankles
Total bones in human body?
206 bones exist in your body.
Functions of the Skeletal System
To support and protect. For body movement. To Produce Blood Cells and Storage of Minerals and Fats.
Epiphysis
The epiphyses are named according to their location.
The epiphysis closest to the body’s center is the PROXIMAL epiphysis.
The one that is farthest away is the DISTAL epiphysis.
Diaphysis
Diaphysis (shaft of bone)
Articular Cartilage
Smooth, white tissue that covers the ends of bones where they come together to form joints.
Periosteum
a dense layer of vascular connective tissue enveloping the bones except at the surfaces of the joints.
Medullary Cavity
Hollow chamber filled with bone marrow.
Compact Bone Tissue
Wall of the diaphysis.
Spongy Bone Tissue
cancellous, epiphysis. Has red bone Marrow.
Functions of Yellow Bone Marrow
Stores Fat
Functions of Red Bone Marrow
Creates new blood cells
long
Leverage. Includes Femur, Tibia, Fibula, Metatarsals, Humorous, Ulna, radius, Metacarpals, Phalanges.
short
Provide stability support, while allowing for some motor function.
flat
Points of attachment for muscles. Sternum, Ribs, Scapulae, Cranial bones
irregular
Protect internal organs, Vertebrae Facial Bones
sesamoid
Protect tendons, Paterliae
Pivot Joint (vertebrae in neck area)
Uniaxial joint, allows rotational movement.
Ex: the joint of the first and second vertebrae of the neck that allows the head to move back and forth
Hinge Joint (ebow)
Uniaxial joint; allows Flexion/Extension Movements
Ex: the fingers, knees, elbows, and toes, allow only bending and straightening movements.
Saddle Joint (thumb)
Biaxial joint; allows Flexion/Extension, abduction/adduction and circumduction movements.
Ex: the trapeziometacarpal joint at the base of your thumb
Ball and Socket Joint (hip)
Multiaxial joint; allows Flexion/Extension, abduction/adduction, circumduction and medial/lateral rotation movements.
Ex: Shoulder and hip joints
Condyloid Joint (wrist)
Biaxial joint; allows Flexion/Extension, abduction/adduction and circumduction movements.
Ex:elbow, wrist joints, carpals of the wrist, and at the base of the index finger.
Plane Joint (between tarsals)
Multiaxial joint; allows inversion and eversion of foot, or flexion/extension, and lateral flexion of the vertebral column.
Ex: intertarsal joints of foot; superior-inferior articular process articulations between vertebrae.
Abduction/Adduction/Circumduction
Moving limb away from body. Moving limb towards body. Rotating limb in circle.
Rotation
Lateral is rotating away from the midline of the body, outwords. Medial is rotating towards the midline of the body
Supination/Pronation
hands cupped. Hands flat.
Dorsiflexion/Plantar Flexion
Only heel touching the ground. Standing on tippy toes.
Inversion/Eversion
big toe up, foot tilted. Big toe touching ground tilted.
Protraction/Retraction
Moving away from spine. Moving towards spine.
Depression/Elevation
Lowering body. Raising body.
Opposition/Reposition
Moving your bones. Keeping them in anatomical position.
Flexion/Extension
Folding. Straightening
How many bones are in the cranium?
22
What is the only movable bone in your skull?
The M a n d i b l e
What are the five vertebral regions (from superior to inferior)?
Cervical Vertebrae Thoracic Vertebrae Lumbar Vertebrae sacrum Vertebrae coccyx Vertebrae
How many vertebrae are in cervical?
7
How many vertebrae are in thoracic?
12
How many vertebrae are in lumbar?
5 L1-L5
Scoliosis
Scoliosis is where the spine twists and curves to the side.
Kyphosis
Hunchback bsclly
Lordosis
its when your spine bends inward like a pregnant person’s back.
What does the thoracic cage protect?
Protects the heart and lungs.
Costal cartilage
The costal cartilages are bars of hyaline cartilage which serve to prolong the ribs forward and contribute very materially to the elasticity of the walls of the thorax
Three types of ribs, and how many of each?
True Ribs( Ribs 1-7), False Ribs( Ribs 8-12), and Floating Ribs( Ribs 11-12)
Main bones of the pectoral girdle
the clavicle and scapula.
Humerus (describe its location)
Located between your shoulder and elbow.
Radius (describe its location)
The radius is one of the two bones that make up the forearm, the other being the ulna. It forms the radio-carpel joint at the wrist and the radio-ulnar joint at the elbow. It is in the lateral forearm when in the anatomical position. It is the smaller of the two bones.
Ulna (describe its location)
The ulna is a long bone in the forearm. It lies medially and parallel to the radius, the second of the forearm bones.
Carpals (describe its location)
The carpal bones are bones of the wrist that connect the distal aspects of the radial and ulnar bones of the forearm to the bases of the five metacarpal bones of the hand.
Metacarpals (describe its location)
the intermediate part of the skeletal hand located between the phalanges of the fingers and the carpal bones of the wrist which
Phalanges (describe its location)
The proximal phalanges (hand) are the bones that are found at the bottom of the finger.
Femur (describe its location)
Thighbone, upper bone of the leg or hind leg.
Tibia (describe its location)
The tibia is the main bone of the lower leg, forming what is more commonly known as the shin.
Fibula (describe its location)
The fibula is a bone located within the lateral aspect of the leg
Tarsals (describe its location)
The tarsal bones are located in the midfoot and the rearfoot (also called hindfoot) areas of the human foot.
Metatarsals (describe its location)
The metatarsal bones are the bones of the forefoot that connect the distal aspects of the cuneiform (medial, intermediate and lateral) bones and cuboid bone to the base of the five phalanges of the foot.
Transverse Fracture
Occurs straight across the long axis of the bone.
Oblique Fracture
Occurs at an angle that is not 90 degrees.
Spiral Fracture
Bone segments are pulled apart as a result of a twisting motion.
Comminuted Fracture
Several breaks result in many small pieces between two large segments.
Impacted Fracture
one fragment is driven into the other, usually as a result of compression.
Greenstick Fracture
A partial fracture in which only one side of the bone is broken.
Open (or Compound) Fracture
a fracture in which at least one end of the broken bone tears through the skin; carries a high risk of infection
Closed (or Simple) Fracture
A fracture in which the skin stays intact.