Lesson 4

Three types of muscles:

1) Skeletal muscle

• muscles that are attached to bone

• striated appearance

• voluntary

2) cardiac muscle

• It is the muscles in myocardium

• striated appearance and it has black bands

• Involuntary

3) smooth muscle

• It is the muscles of gallbladder and urinary bladder

• It has an elongated cells

• Involuntary

  
  

Function of muscles:

1) Movement of the skeleton

2) Contracting or beating of the heart

3) peristalsis (moving of ingesta)

4) movement of eyeball

5) erection of skin

Arrangement of muscles:

1) Parallel

2) fusiform

3) Unipinnate

4)Bipinnate

5) multipennate

6) convergent

7) circular

Rules in naming muscles:

1) size,shape

2) Muscles in the body of domestic animal can be classified into 5

a) Muscles of Head

b) Neck

c) Anterior limb

b) Trunk & tail

d) Posterior limb

3. Muscles in mammals are different to Avian & chickens

a) behavioral aspect

b) Pectoral muscle / shoulder muscle

4) Latin terms are used

• ends with tus,les,eus,ius,icus

5) some muscles are named after the bone/ body part adjacent to them

6) some muscles are name based on their respective action

7) some muscles named after the number of head present

Functional moving muscLes:

1. Agonist / Prime Mover

• It is me muscle responsible for a certain movement

• ex: para maclose yun mouthmusc

2. Synergis

• "Supporting the axial of agonist / prime mover

3. Antagonis

• Muscle that opposes the action of prime mover/agonist

Fixator

• Stabilizes a body