Soc 14 The Muscular System Flashcards
Deltoid
Rounded, triangular muscle on the uppermost part of the arm and at the top of the shoulder.
Move the arm in all directions at the shoulder
Pectoralis major
Coverin the chest.
Adduct the arm at the shoulder.
Latissimus dorsi
Broad sheet of muscle that extends from the lower region of the spine to the bone in the upper arm (humerus).
Adduct and extend the arm at the shoulder
Biceps
Front of the upper arm.
Flex the arm at the elbow
Triceps
Back of the upper arm.
Extend the arm at the back of the upper arm
External obliques
To the side of the abdomen, running from the lower half of the ribs down to the pelvis.
Pull the chest downwards; flex and rotate the spinal column; one side contracting creates a side bend.
Gluteals
Form the buttocks. Gluteus maximus (the largest) lies just under the skin, and is attached to the femur (thigh bone).
Adduct and extend leg at the hips, pull the leg backwards.
Hip flexors
Sit deep in the front of the hip and connect the leg, pelvis and abdomen.
Flex the hip, help move the leg and knee up towards the body.
Quadriceps
Four muscles found on the front of the upper leg.
Extend the leg at the knee
Hamstrings
Found on the back of the leg, stretching from the bottom part of the pelvis to the tibia (the shin bone).
Flex the leg at the knee
Gastrocnemius
Starts at the back of the femur and comes together with the soleus muscle to form the Achilles tendons at the back of the ankle.
Point the toes (plantar-flexes the ankle), help flex the knee
Tibialis anterior
Runs down the shin
Pull the toes up towards the shin (dorsi-flexes the ankle).
Fulcrum
The point around which the lever rotates
Articulation
The state of having a joint; being a joint
Articulate
Act as a joint
