Purpose of the Skeleton
Provide support for the body
Make blood cells
Provide attachments for muscles and tendons
Shape of the body
Store calcium phosphate
Protect vital organs such as the brain, heart, lungs, and spinal cord.
Words that Relate to the Movement of the Body? and their meanings (8)
Posterior-at the back
Distal-away from the source of the limbs
Proximal-near the source of the limbs
Inferior-move down the body
Superior-move up the body
Medial-near the midline
Lateral-away from the mid line
Types of Movement of Joints (6)
Flexion-closing of the joint
Extension-opening of the joint
Abduction-movement away from the midline or imaginary centre line
Adduction-movement towards midline or imaginary centre line
Circumduction-combination of all movement at a joint
Rotation-twisting movement at a joint
Movement of the Joints Continued (6)
Pronation-turning the forearm over to face downwards
Supination-turning the palm up pr forwards
Inversion-turning the sole of the foot inwards
Eversion-turning the sole of the foot outwards
Dorsiflexion-points your toes towards the ceiling
Plantar flexion-when you point your toes towards the floor
What Do muscles usually do?
Skeleton Muscles usually work in Pairs
What are the short-term effects of Exercise?
Heart rate goes up-Muscles start to work harder, therefore requiring more oxygen and producing more carbon dioxide, which needs to be, removes from the body.
Breathing is deeper-hearts starts working harder, so supplies of blood are sent around the body for use by the muscles.
Blood pressure increases-Lungs work harder; breathing is now faster and deeper. Takes in more oxygen and remove more carbon dioxide.
Short Term Effects of Exercise Continued
Respiration goes up-contracting muscles squeeze the veins, squiring blood back from the heart much faster
Sweating starts-Helps to remove heat generate from the body and cool it down
Body temperature goes up-heart fills up more, relaxes then contracts more strongly pumping more blood with each beat.
What is Balance?
An equal force from the opposite direction balances a force from any given direction.
What is Centre of Gravity?
A force that is always present and is a pulling force in the direction of the centre of the earth.
-Force acts on everybody through an imaginary point called the CENTER OR GARVITY
Can be described as the centre point of weight and balance.
Base of support?
The wider the support the more balanced the object will be
Stability of the Body depends on?
The height and centre gravity
The size of the base of support
The line of Gravity
Mass of the body
The direction of the applied force
Principles of Projectile motion?
The movement of Objects in the air
-May be a shot put in the air
-Basketball player in the air, performing Jump shot
-Gymnast doing back flip
-Badminton player leaping to play a smash
Distant object travel on depends on?
A-Angle The angle of release
H-Height Height of release
V-Velocity Velocity of release
Principles of Motion?
Linear-Running a straight line
Rotary-Rotation round axis (round joint)
General-the two at the same time (such as swimming)
What is fourcemation?
When maximum force is wanted to be applied/desired.
Use as many contributing body parts as possible.
The Working Muscle ?
Contracts and Shortens
Explain in Detail how the quads and hamstrings work together to cause movement and control extension of the knee joint?
In the extension of the knee joint the agonist muscle, which is the working muscle, is the quadriceps. The antagonist, the relaxing muscle, is the hamstring. This shows that muscles work in pairs to provide movement. The agonist is the muscle that contracts and shortens and the antagonist is the muscle that relaxes.