Buccinator
Used to suck in your cheeks
Frontalis
Used to form the horizontal frown crease on the forehead
Masseter
Prime mover of jaw closure
Orbicularis oculi
Used in winking
Orbicularis oris
The "kissing" muscle
Sternocleidomastoid
Prime mover of head flexion; a two-headed muscle
Temporalis
Synergist muscle for jaw closure
Zygomaticus
Used in smiling
Deltoid
Prime mover of for shoulder abduction
Diaphragm
Unpaired muscle that acts with the muscles named immediately above to accomplish inspiration
External intercostal
Deep muscles of the thorax that promote the inspiratory phase of breathing
External Oblique
Part of the abdominal girdle; forms the external lateral walls of the abdomen.
Internal Oblique and Transversus abdominus
Two muscle pairs that help form the natural abdominal girdle
Pectoralis Major
Prime mover for shoulder flexion and adduction
Rectus abdominus
The name means "straight muscle of the abdomen
Sternocleidomastoid
Acting alone, each muscle of this pair turns the head toward the opposite shoulder
Trapezius
Muscle that allows you to shrug your shoulders or extend your head
Erector spinae
Prime mover of back extension; a deep composite muscle consisting of three columns
Latismus Dorsi
Muscle that adducts shoulder and causes extension of the shoulder joint.
Quadratus lumborum
Fleshy muscle forming part of the posterior abdominal wall that helps maintain upright posture.
Adductors
Muscle group that allows you to draw your legs to the midline of your body, as when standing at attention
Fibularis Muscle
Muscle group of the lateral leg; plantar flex and evert the foot
Gastrocnemius
toe dancer's" muscle; a two-bellied muscle of the calf
Gluteus Maximus
Used to extend the hip when climbing the stairs
Gluteus medius
Smaller hip muscle commonly used as an injection site.
Iliopsoas
Hip flexor, deep in pelvis; a composite of two muscles
Quadriceps
Muscle group that extends the knees
Sartorius
Straplike muscle that is a weak thigh flexor; the "tailor's muscle
Soleus
A plantar flexor muscle
Tibialis Anterior
Inverts and dorsiflexes the foot
Flexor carpi ulnaris
Wrist flexor that follows the ulna
Extensor Digitorium
Muscle that extends the fingers
Flexor Digitorium superficialis
Muscle that flexes the fingers
Biceps brachii
Muscle that allows you to bend (flex) the elbow
Triceps brachii
Muscle that extends the elbow
Deltoid
Powerful shoulder abductor, used to raise the arm overhead
Endomysium
Thin connective tissue investing each muscle
Epimysium
Connective tissue ensheathing the entire muscle
Fasicle
A discrete bundle of muscle cells
Myofilament
Actin or myosin containing structure
Myofibril
A long, filamentous organelle found within muscle cells that has a banded appearance
Perimysium
Connective tissure surrounding a fasicle
Sarcolemma
Plasma membrane of the muscle cell
sarcomere
Contractile unit of muscle
Tendon
Cordlike extension of connective tissue beyond the muscle, serving to attach it to the bone.