Anat Chap 9 Muscles

Front 1

Epimysium

Back 1

Layer of dense irregular connective tissue surrounding entire skeletal muscle

Front 2

Fasicle

Back 2

Bundle of muscle fiber cells together

Front 3

Perimysium

Back 3

Connective tissue fibers that separate skeletal muscle into fascicles

Front 4

Endomysium

Back 4

Surrounds each muscle fiber within a fascicle and binds muscle fibers together

Front 5

Myosatellite Cells

Back 5

Muscle stem cells neighboring muscle fibers to repair damaged muscle cells

Front 6

Muscle fibers

Back 6

Individual muscle cells with many contractile organelles called myofibrils

Front 7

Myofibrils

Back 7

Contractile organelles in muscle fibers made of component parts called sarcomeres

Front 8

M line

Back 8

The midline of a sarcomere

Front 9

Z Line

Back 9

The shortening line of a sarcomere when it contracts

Front 10

H band

Back 10

The interval of space neighboring the m-line and before the A band

Front 11

Motor Unit

Back 11

All muscle fibers controlled by one motor neuron

Front 12

Fast fibers

Back 12

Large diameter muscles that use anaerobic metabolism that works for precise movements. Ex are muscles in the eyes

Front 13

Slow fibers

Back 13

Small diameter muscles that use aerobic metabolism and works slowly like large muscles

Front 14

Intermediate Fibers

Back 14

Muscles that are in between fast and slow fiber diameters

Front 15

Parallel Fibers

Back 15

Muscle fibers that are running parallel to tendon

Front 16

Convergent Muscles

Back 16

Muscles that fan in directions then converge on muscle tendon

Front 17

Pennate muscles

Back 17

Muscles that are angled away from tendon, such as unipennate, bipennate, and multipennate

Front 18

Circular Muscles

Back 18

Muscles that are circular in structure like orbicularis oris

Front 19

First class levers

Back 19

Levers of muscle with the fulcrum in the middle and the resistance and force applied on either side

Front 20

Second class Lever

Back 20

Muscle levers with the resistance in between fulcrum and force applied

Front 21

Third class lever

Back 21

Muscle lever with the force applied in between fulcrum and resistance

Front 22

Agonist

Back 22

Muscle performing primary action

Front 23

Antagonist

Back 23

Muscle performing contrary movement to primary agonist

Front 24

Synergist

Back 24

Muscle helping agonist perform function