Skeletal system Flashcards
How many bones are babies born with?
300 bones
Adults have how many bones?
206 bones
More than half the bones human body are in
The hands and feet
Moveable joints
Elbows and knees
Immovable joints
In Pelvis and skull
A joint is
The point two or more bones are joined together
Osteoloy
The study of bone
Long bones
Found in arms and legs
Flat bones
Plate shaped and located in skull, scapula, and sternum
Irregular bones
Found in wrist, ankle, and spinal column
Bones are composed of
2/3 mineral matter and 1/3 organic matter
Bones produce
Red and white blood cells
Functions of the skeletal system
Support body
Surrounds and protects organs
Provide frame for muscles to attach
Allow body movement
The skull
Divided into 2 groups of bones
Cranium (8 bones)
Facial skeleton (14 bones)
Cranium bones
Frontal
Parietal
Occipital
Temporal
Frontal bone
Extends from top of eyes to top of head
Forms FOREHEAD
Parietal bones
2 bones that form crown and upper sides of head
Occipital bone
Forms the back of the skull, indenting above nape area
Temporal bones
2 bones located on either side of head, directly above ears and below parietal bones
Mandible bone
Lower jaw and largest bone in facial skeleton
Maxillae bones
2 bones of upper jaw
Nasal bones
Two bones which join to form nose bridge
Zygomatic malar bones
2 bones that form upper cheek and bottom of eye socket
Lacrimal bones
Smallest 2 bones of facial skeleton and form the front part of inner bottom wall of eye socket
Neck bones
1-7 cervical vertebrae: 7 bones that form to of spinal column, involved in extended scalp massages
8 hyoid: u shaped bone at the base of the tongue, supports tongue muscle
Back, chest, and shoulder bones
1Thoracic vertebrae
2Sternum
3-14 ribs
15 clavicle
16 scapula
Arm wrist and hand bones
1 humerus- largest bone of upper arm
2 radius- small bone on thumb side
3 ulna- small bone on pinky side
4 carpals- 8 small bones form wrist
5 metacarpals- 5 long bones form palm
6 phalanges- 14 bones that form fingers
Leg ankle and foot bones
1 femur- thigh bone longest bone in body
2 patella - kneecap
3 tibia- shinbone inner and larger of lower leg bone
4 fibula- outer and narrower of 2 lower leg bone
5 talus- ankle bone
6 tarsals- 7 bones make up mid foot and rear foot
7 metatarsals- 5 long slender bones connect phalanges to tarsals
8 phalanges 14 bones that form toes
