Musculo-Skeletal System
Role of the Musculo-skeletal System To provide support & protection for our organs Allows movement
Sections of the Skeleton Interactive-biology.com
Functions of Each Section All bones provide the function of support. Additionally: Head: protection for our brain Spinal Column: rotation, flexibility Thorax: protects lungs and heart Upper & Lower Limbs: bones act as levers for lifting and walking; bone marrow stores important minerals; bone marrow produces red blood cells
Joints Roles of joints: – Links bones together (ligaments) – Helps with mobility (moving) (tendons) Chop.edu
Types of Joint Movement p225 Rotation
Flexion and extension
Antagonistic Muscles Antagonistic muscles are muscles that act in opposite ways. i.e. Biceps and triceps Talktalk.co.uk
Types of Muscles There are three main types of muscles: Skeletal, cardiac, smooth Different by structure, function and endurance. Where each type is found in the body depends on what it is used for
Muscle Fibers Look like: Striated muscles have stripes Unstriated have no stripes
Skeletal muscle - Striated - we have voluntary control - good for short term, strength - in our arms, legs, back, abs, etc Stevegallik.org
Cardiac (heart) muscle - striated (the arrow points to it) - is involuntary - for long term endurance and strength - found in our heart seys-science.wikispaces.com
Smooth Muscle - unstriated - for involuntary muscle contractions (like in our digestive tract)
Major Muscle Groups Myweightlifting.com