PE BONES Flashcards
How many bones does the human baby have?
300
How many bones do you have in adulthood?
206
Why do you have less bones when you grow up?
bones fuse, harden and grow
Why do bones harden?
ossification
How do bones vary?
shape and size
What are bones composed of?
living tissues are constantly broken down
What is the outer layer of a bone?
- periosteum
- covered in blood vessel and nerves
What is the inner part of a bone?
- medullary cavity
- filled with bone marrow
What are the 5 functions of the skeletal system?
- support (bodys framework)
- protection (protects vital organs)
- movement (works with muscles to move)
- storage (stores minerals)
- blood cell production (bone marrow makes blood cells)
What does the axial skeleton include?
middle and head
What does the appendicular skeleton do?
arms and legs
What bones are in the toes?
tarsal bones
What 2 bones are in the lower leg?
tibia and fibula
What us the hip bone?
pubis
What are the finger bones?
metacarpals
What are the two bones in the lower arm?
radius and ulna
What is the bone in the upper arm?
humerus
What is the shoulder bone?
scapula
What is the spine bone?
vertebral column
What is the 2 chest bones called?
rib cage - edges
sternum - centre
What are the 2 head bones?
skull - top head
mandible - jaw
What are the 5 parts of vertebral column from top to bottom?
UN-FUSED
- cervical 7
- thoracic 12
- lumbar 5
FUSED
- sacrum 5
- coccyx 4
How bones bones are in the vertebral column?
33
What are the 5 different bone types?
- flat
- long
- irregular
- short
- sesamoid
What are flat bones?
- thin, flat and generally curved
- protection for organs and muscle attachments sites
- scapula, skull and sternum
What are examples of flat bones?
scapula, skull and sternum
What are long bones?
- long with tubular shape
- supporting body weight
- femur, humerus and tibia
What are examples of long bones?
femur, humerus and tibia
What are irregular bones?
- complex shape
- provide support and protection
- vertebre and mandible
What are example of irregular bones?
vertebra and mandible
What are short bones?
- roughly cube shaped
- stability, support and movement
- carpals and tarsals
What are examples of short bones?
carpals and tarsals
What are sesamoid bones?
- small and round
- found within tendons
- protect tendon
- patella and pisiform bone
What are examples sesamoid bones?
patella and pisiform bone
What is cartilage?
- connective tissue
- cushions between bones of a joint
What are ligaments?
- tough fibrous tissues
- bone to bone
- stability
What are tendons?
- muscle to bone
- movement
What are the 3 Types of joints
FCs
Fibrous Joints
Cartilaginous joints
Synovial joints
What are fibrous joints?
- connected by fibrous tissue
- no movement
- bone + skull
What are cartilaginous joints?
- connected by cartilage
- limited movement
- vertebrae + spine