Axial Muscles

Head & Torso

Belly (Made of dense irregular CT)

Part of the muscle that contracts

What attaches the bone to belly

tendon and aponeurosis

Insertion

Bone moves when belly contracts

Synergist

(Muscles with )Same action of same body parts

Antagonist

(muscles with) opposite action

Why are skeletal musklces multinucleic

Stem cells fuse

Characteristics of skeletal muscle (location, function, control mode, shape)

Location: Bone

Function: Move bone

Control mode: Voluntary

Shape: Cylindrical, striated, multinuclear

Characteristics of cardiac muscle (location, function, control mode, shape, junctions, structure)

Location: heart

Function: Heartbeat

Control mode: Involuntary

Shape: branched, striated, uninuclear

junctions: gap & desmosomes

structure: intercalated disks

Characteristics of smooth muscle (location, function, control mode, shape, structure)

Location: internal organs + Skin

Function: Move internal organs

Control: Involuntary

Shape: spindle, uninuclear

Identify the structure and function of #2

Intercalated disks

function: Join adjacent cardiac muscle cells

Identify the structure and function of #1

Sarcolemma of skeletal muscle

function: action potential occurs

identify the structure and function of #2

structure: Endomysium

Function: binds neighboring muscle fibers

identify the structure and function of #3

structure: Motor end plate

Function: Increase surface area

identify the structure #4

synaptic bulb

identify the structure of #5

telodendria

identify the structure of #3

Nucleus

identify the structure anf function of #6

Structure: Myofibrils

Function: allow fiber to contract

identify the structure of #2 in the skeletal muscle fiber

neuromuscular junction

identify the structure and function of #1 and 2

Structure: epicranius

function: Raise eyebrows

identify the structure, function, origin, and insertion of #3

structure: Temporalis

Function: elevate mandible

origin: Temporal bone

insertion: Coronoid process of mandible

Identify the structure, function, origin, and insertion of #4 (synergist to temporalis)

Structure: Masseter

Function: Elevate Mandible

origin: Zygomatic arch

Insertion: Angle & Ramus of mandible

Identify the structure

Masseter

Identify the structure

epicranius

Identify the structure, function, origin, and insertion of #1

Structure: Zygomaticus major

function: Smile

Origin: zygomatic arch

Insertion: corner of mouth

identify the structure and function of #2

Structure: Orbicularis Oculi

Function: Close eye

Identify the structure and function of #3

Structure: orbicularis oris

function: purse lips

Identify the structures of #1-4

1. Epicranius

2. Zygomaticus Major

3. Orbicularis oris

4. orbicularis oculi

Identify the structure, function, origin, and insertion of #5

Structure: Sternocleidomastoid

Function: Rotate and flex the head

origin: sternum + clavicle

inserstion: Mastoid process temporal

Identify the structure and function of #6

structure: Splenius capitis

function: Rotate and extend head

function of Platysma (superficial)

depress mandible + tighten neck skin

Identify the structure and function of #1

Structure: Superior rectus muscle

Function: move eye superiorly

Identify the structure and function of #2

Structure: Lateral rectus muscle

function: Move eye laterally

Identify the structure and function of #3

structure: Medial Rectus muslce

Function: Move eye medially

Identify the structure and function

structure: Inferior rectus muscle

Funtion: Move eye inferiorly

Identify the structure, function, origin, and insertion of #1

Structure: rectus abdominis

function: Flex torso

origin: pubis

insertion: zyphoid process of sternum + ribs

Name the antagonist of the rectus abdominis

Erector spinae (extend torse)

Identify the structure and function of #2

structure: External oblique

function: compress + rotate torso

Identify the structure and function of #1 (internal view)

Structure: Transverse abdominis

function: Compress torso

Identify the structure and function of #2

structure: internal intercostals

function: exhale

Identify the structure and function of #1

structure diagram:

function: inhale

Identify the structure and function of #5

structure: External Intercostal muscle

function: Inhale

identify structure and function

erector spinae

function: extent trunk

function of internal oblique

compress abdomen + rotate

Identify structure and function of #1

Structure: Diaphragm

Function: Exhale

Identify structure, function, origin, insertion of #1

Structure: Pectoralis minor

Function: Abduct scapula

origin: ribs

insertion: coracoid process of scapula

Identify structure and function

Structure: serratus anterior

function: Abduct scapula

Identify structure and function of the outlined portion

structure: Trapezius

function: elevate, adduct, depress scapula

Identify structure, function, origin, and insertion of the outlined portion

structure: Deltoid

function: Flex, abduct, extend arm

origin: clavicle, acromion, and spine of scapula

insertion: deltoid tuberosity