Skeletal System L3 Flashcards
Human skeleton consists of
206 bones
Bone is a
A hard type of connective tissue which forms the skeleton
What are the functions of bone?
1-Support
2-Protect internal organs
3-Movement
4-Mineral storage
5-Blood Cell Formation
(Hematopoiesis)
According to the microscopic structure
1-Compact
2-Spongy cancellous bone
Classifications Of Bones
According to development
Membranous ossification
Cartilaginous ossification
Consists of a honeycomb of small flat pieces
Spongy cancellous bone
The flat pieces filled
with bone marrow is
trabeculae
The process of bone tissue formation
Ossification
The mesenchymal tissue
membrane will directly
transform into bone in which kind of Ossifications
Membranous
An example of Membranous ossification
bones of the vault of
skull and clavicle
A hyaline cartilage model will be
ossified into bone
Cartilaginous ossification
Examples for Cartilaginous ossification
long bones, bones of
the base of skull, irregular bones
like vertebrae
Classifications Of Bones
According to the shape of
bones
Long/ short
Flat
Seasamoid
Irregular
Pneumatic
Femur and humerus is an example for which classification of bones according to it’s shape
Long
Carpal bones and tarsal bones
is an example for which classification of bones according to it’s shape
Short bones
vault of skull,ribs, sternum is an example for which bone according to it’s shape
Flat
Vertebrae and hip bone is an example for which bone according to it’s shape
Irregular
Patella is an example for which bone according to it’s shape
Sesamoid
Frontal, maxilla, sphenoid and ethmoid is an example for which bone according to it’s shape
Pneumatic
The long bone structure consists of
Diaphysis (shaft)
Epiphysis (End)
Nutrient arteries
Articular cartilage
Medullary cavity
Epiphyseal plate
Which part of the bone is Composed of compact bone
Diaphysis
Which part of the bone is composed mostly of spongy bone
Epiphysis
The junction of diaphysis and epiphysis is called
Metaphysis
What Covers the external surface of the epiphysis
Articular cartilage
Articular cartilage is made of
Hyaline cartilage
What is the function of articular cartilage
Decreases friction at joint surfaces
The Cavity of the shaft is the
Medullary cavity
What part of the long bone contains bone marrow?
Medullary cavity
Epiphyseal plate function is to
Allow growth of the bone
Epiphyseal plate contains what type of cartilages
Hyaline
The skeleton is subdivided into
- The Axial skeleton
- The Appendicular skeleton
How many bones is the axial skeleton consisted of ?
80
How many bones is the Appendicular skeleton consisted of
126 bone
The Axial skeleton is Divided into three parts:
Skull
Vertebral column
Bony thorax (ribs and sternum)
Skull is made up of how many bones
22
Skull is divided into 2 sets of bones?
Cranium
Facial
The set of bone that Encloses and protects the brain Consists of the following bones
- Frontal
- Parietal
- Temporal
- Sphenoid
- Occipital
- Ethmoid
The set of bone that Encloses and protects the brain are
- Frontal
- Parietal
- Temporal
- Sphenoid
- Occipital
- Ethmoid
The set of the bone that Form the skeleton of the face Consists of ?
- Maxilla
- Mandible
- Zygomatic bone
- Nasal bone
The vertebral column is formed of
33 irregular bones
Cervical is formed of how many bone
7 vertebrae
Thoracic is formed of how many bone
12
Lumbar is formed of how many bone
5
Sacrum is formed of how many bone
5 vertebrae sacral fused to from a
triangular bone
5 vertebrae fused to from a
triangular bone called sacrum
coccyx is formed of how many bone
4 vertebrae Coccygeal fused to form a small bone called coccyx
The vertebra typically consist of
- Body
- Vertebral arch
- Processes
- Vertebral foramen
Vertebral arch consists of
pedicle & lamina
Processes consists of
Spine
Transverse process
Articular process
The vertebrae are connected together by
Intervertebral discs
Vertebrae in different regions of the vertebral column vary in
size,shape, and details
Foramen makes a canal for the
Spinal cord
Thoracic cage consists of
Sternum and ribs
Sternum Has three parts name them
a. Manubrium sterni
b. Body
c. Xiphoid process
The ribs are divided into
True (The upper 7)
False (8,9,10)
Floating ribs (11,12)
Bones connecting the upper limb with the axial skeleton
Pectoral girdle (Clavicle-Scapula)
Bones connecting the lower limb with the axial skeleton
Pelvic Girdle (Two hip bones)
BONES OF THE UPPER LIMB are?
Bone of arm
Bones of forearm
Bones of hand
Bone of arm and forearm are
Humerus
Radius (lateral)
Ulna (medial)
Bones of hand are
- 8 carpal bones
- 5 metacarpal bones
- 14 phalanges: 2 for thumb & 3 for each of medial 4 fingers
Bones of thigh and leg
Femur
Fibula (lateral)
Tibia (medial)
Bones of the lower limb
Bone of thigh
Bones of legs
Patella
Bones of foot
Bones of foot
7 tarsal bones
5 metatarsal bones
14 phalanges: 2 for big
Tarsal bones toe & 3 for each of
lateral 4 toe