Soc 14- Muscular System Flashcards
Location of Deltoid
In the upper part of the body, covering the shoulders
Function of Deltoid
Raise the arms in all directions at the shoulders
Example of a sport where a deltoid is used
Swimming
Location of pectoralis major
In the upper part of the chest at the front
Function of the pectorialis major
Adduct the arm at the shoulder
Example of a sport where the Pectoralis major is used
Boxing
Location of Latissimus dorsi
At the back of the body, either side of the chest
Eample of a sport where the latissimus dorsi is used
Rowing
Location of the biceps
At the top of each arm at the front
Function of the biceps
Flex the arm at the elbow
Function of the latissimus dorsi
Pull your arms down at the shoulders and behind your back
Location of the triceps
At the top of each arm at the back
Function of triceps
Extend the arm at the elbow
Location of external obliques
To the side of the abdomen
Function of the external obliques
Pull the chest downwards. Flex and rotate the spinal column.
Location of gluteals
In the middle of the body at the back forming the bottom
Function of the gluteals
Adduct and extend the leg at the hips, pull the leg backwards
Location of the hip flexors
Sit deep in the front of the hip and connect the leg
Function of the hip flexors
Flex the hip, help the leg and knee up towards the body
Location of the quadriceps
At the top of each leg at the front
Function of the quadriceps
Extend the leg at the knee
Location of the hamstrings
At the top of each leg at the back
Function of the hamstring
Flex the leg at the knees
Location of the gastrocnemius
At the bottom of each leg at the back. Also known as the calf muscles.
Function of the gastrocnemius
Point the toes ( planta flexion ) at the ankle
Location of the tibialis anterior
Runs down the shin.
Function of the tibialis anterior
Pull the toes up towards the shin (dorsi-flexion).
Voluntary muscles
They are under your control, you can choose when to contract or relax them.
Involuntary muscles
They are not under our control. They contract and relax automatically controlled by the involuntary nervous system.
Cardiac muscle
A specialised type of tissue that only exists in the heart
Type 1 muscle fibres
Slow twitch
Suit endurace activities
Darker due to myoglobin
Type II a
Fast twitch
Anaerobic work
Improved through endurance training
Type II x
Used in anaerobic work that can generate more power than other muscle fibres but fatigue quickly
Fast twitch
