skeletal system Flashcards
What are bones mostly made out of at birth?
Cartilage
What replaces the cartilage when growing bones?
Bone tissue
What is at the end of long bones?
Ephiysis
Soft spot on back of baby’s head is ?
fontanels
What is it called where the and skull bones meet?
Sutures
What is the axial system
Upper body bones
appendicular system
lower body bones
cells called __________ form new bones continuously.
osteoblasts
how do broken bones heal
blood clots close, white blood cells clean, cartilage fills gap, compact bone replaces cartilage
What is the outer layer of bone called?
periosteum
What’s under the periosteum
compact bone
Whats in the center of bone?
spongey bone
What color is bone marrow
Yellow and red
What is yellow marrow
its the inside of bone that holds fat
what is red bone marrow
creates blood cells
what are joints
where two bones meet
what are ligaments
tissue holding bones together
tendons
connect muscles to bones
how can joints not scrape
synovial fluid
Do all joints move?
No
semi movable joints
only small movement like the vertebrates in spine
hinge joint
knees and elbows, going back and forth
joints that don’t move
fixed joint
ball and socket joint
most flexible, hips and shoulders
