a+p
what is a fixator
the muscle which stabilises the joint but it doesnt move however it contracts to fix muscle to bone
SE= deltoid to hold arm steady when doing a bicep curl
what are the aspects of a synovial joint which protect against injury
cartilage
synovial membrane
synovial fluid
what are the components of synovial joints
ligaments - attach bone to bone and prevent dislocations
tendons - attach muscle to bone and help transmit power of the muscle
cartilage - reduces friction / stops bones from grinding together and absorbs shock
SE for all 3 lever systems
1st class - heading a football or throwing a tennis ball
2nd class - high jump or long jump
3rd class - bicep curl
what is the pulmonary curcuit
when the blood flows from the heart to lungs and then back to the heart
what is a double circulaitory system
when the blood flows through the heart twice. contains pulmonary circuit and systemic circuit
what is the systemic circuit
this is when the blood flows from the heart to the rest if the body and then back to the heart
what are the 6 functions of the skeleton
posture
protection
movement
support
mineral storage
red blood cell production
pathway of blood
right atrium - tricuspid valve - right ventricle - semi lunar valve - pulmonary artery - lungs - pulmonary vein - left atrium - bicuspid valve - left ventricle - semi lunar valve - arota - body - vena cava and repeat
importance of red blood cells during cross country
deliver oxygen to the working muscles in high demand and to transport carbon dioxide back to the lungs
longitudinal adis of rotation
from head to toe
allows 'spinny' rotation
SE=pirouette in dance or pivoting in netball
transverse axis of rotation
from front to back
allows sideways rotation
SE= cartwheel