B1a Joints

• Biologie
• Middelbare school
• vwo
• Leerjaar 1

Joints that make you move

freely movable joints

Pivot joints (ulna and radius)

Ball-and-socket joints (like it says)

Hinge joints- (like a door)

ball and socket joint

pivot joint

rotating movement in one direction

Hinge joint

Moves in one direction

Like a door or window

HINGE JOINT

A type of freely moveable joints is:

1. fixed
2. intervertebral discs
3. fontanelle
4. hinge joint

What type of joints are the pivot, hinge and ball-and-socket joint?

1. Synovial joints
2. Fibrous joints
3. Cartilaginous joints
4. Sutures

Match the correct name and example to the correct joint.

Ball & socket

Hinge

Gliding

Pivot

Knee  

Shoulder

Carpels

Skull base

4.5  Muscles move the bones

Muscles can only contract

          - it becomes shorter and thicker

Some muscles need other muscles to relax

Muscles (voluntary or skeletal)

• Muscles are attached to bones by tendons 
• They constist of small fibres

Two types of muscles

Involuntary muscles = Contract without thinking about it or controlling it.

(muscles of hairs, heart etc.)

Voluntary muscles = You can decide if they contract or not.

(skeletal muscles)

Muscles and joints in a chicken wing

• Tendons are shiny white tissues at the end of the muscles that attach the muscle to the bones. 

vertebra

thighbone

skull

breastbone

rib

pelvis

off to work 

total silence 

4.3 and 4.4

do exc. 2 , 3 ,4 ,6 7