102 ^|

A Handbook of Biology

White

lood cells

b

Platelets

Red blood cells

Blood cells

Dense Irregular

Bone

Collagen fibre

Collagen fibres

Cartilage cell

(chondrocyte)

Haversian

canal

Cartilage

Blood

A

fluid

connective

tissue

containing plasma, red blood

cells (RBC), white blood cells

(WBC) and platelets.

Helps in the circulation of

various substances.

MÜSÇLË TÏSSÜË

Each muscle is made of many long cylindrical

muscle fibres.

1

Muscle fibres are composed of numerous fine

myofibrils. Muscle fibres can contract (shorten)

and relax (lengthen) in a coordinated fashion.

2

Their actions move the body to adjust to the

changes in the environment and maintain the

position of the various parts of the body.

3

Muscles take part in locomotion and movements. 4

Muscles are of 3 types: skeletal, smooth and

cardiac.

5