skeletal system Flashcards
two types of skeleton
Axial and Appendicular
how many bones in Axial & list the main bones
80- skull vertebrate, rib cage, and sternum
How many bones in Appendicular & list the main bones
126-Pectoral girdle, arms, forearms, hands, pelvis, legs, feet, and ankles
Total bones in human body?
206
Functions of the Skeletal System
Function #1 - Support and Protection,Function #2 - Body Movement,Function #3 & 4 - Produce Blood Cells and Storage of Minerals and Fats
(5) The classifications of bones
long,short,flat,irregular,sesamoid
Epiphysis
end bones-Proximal=top,Distal=bottom
Diaphysis
shaft
Articular Cartilage
hyaline cartilage, padding
Periosteum
membrane that covers entire bone
Medullary Cavity
hollow chamber filled with bone marrow
(2) Functions of Red/Yellow Bone Marrow
Red Marrow (blood) Yellow Marrow (fat)
Compact Bone Tissue
wall of the diaphysis
Spongy Bone Tissue
cancellous, epiphysis) - red marrow
Pivot Joint (vertebrae in neck area)
uniaxial joint -rounded portion of a bone is enclosed within a ring
Hinge Joint (ebow)
uniaxial joints-articulation between the trochlea of the humerus and the trochlear notch of the ulna.
Saddle Joint (thumb)
biaxial joints.-bewteen trapezium carpal bone and 1st metacarpal bone
Ball and Socket Joint (hip)
multiaxial joint- the rounded head of one bone (the ball) fits into the concave articulation
Condyloid Joint (wrist)
biaxial joints- the shallow depression at the end of one bone articulates with a rounded structure from an adjacent bone or bones.
Plane Joint (between tarsals)
the articulating surfaces of the bones are flat or slightly curved and of approximately
How many bones are in the cranium?
22 individual bones
What is the only movable bone in your skull?
the mandible
What are the five vertebral regions (from superior to inferior)?
sacrum,pelvis, Similarly, the coccyx, or tailbone,
How many vertebrae are in cervical?
7
