CHAPTER 4.1 SKELETON

• Biologie
• Middelbare school
• havo, vwo
• Leerjaar 1

SKELETONS

FUNCTIONS OF THE SKELETON:

• SUPPORT
• MOVEMENT
• PROTECTION
• BLOOD CELL PRODUCTION

SUPPORT

• WE CAN'T STAND UP STRAIGHT OR EVEN LIFT OUR HEAD WITHOUT OUR BONES.
• WITHOUT THEM WE WOULD BE A PUDDING. 

MOVEMENT

• BECAUSE OUR MUSCLES PULL ON BONES AND THE BONES THEN MOVE.
• OUR MUSCLES ARE ATTACHED TO THE BONES WITH TENDONS.

PROTECTION

• IMPORTANT ORGANS ARE PROTECTED BY BONES.
• LIKE YOUR LUNGS, HEART AND BRAIN 

MAKE BLOOD

• THE BONE MARROW OF LARGER BONES CAN PRODUCE BLOOD CELLS.
• PLATELETS, RED AND WHITE BLOOD CELLS

TYPES OF SKELETONS:

• EXOSKELETON
• ENDOSKELETON
• Hydrostatic SKELETON

• METAMORPHOSIS

ENDOSKELETON

• THE BONES ARE INSIDE THE BODY.
• OFTEN MADE OF CALCIUM AND COLLAGEN.

EXOSKELETON

• THE BONES ARE OUTSIDE THE BODY.
• THESE ANIMALS OFTEN NEED TO MOULT TO GROW.
• THEY OFTEN ALSO DO METAMORPHOSIS.

Hydrostatic SKELETON

• THERE ARE NO BONES.
• THERE ARE TUBES FULL OF LIQUID.
• THESE ARE USUALLY WATER ANIMALS.
• WORMS HAVE THIS TYPE OF SKELETON.

What is the main function of your femur?

1. protection
2. shape
3. support
4. blood cell production

Which type of skeleton do we have?

1. endoskeleton
2. exoskeleton
3. liquid skeleton

Which type of skeleton does a crab have?

1. endoskeleton
2. exoskeleton
3. liquid skeleton

Which type of skeleton does a jellyfish have?

1. endoskeleton
2. exoskeleton
3. liquid skeleton

What is the main function of your skull?

1. protection
2. movement
3. support
4. blood cell production

What types of skeleton mostly do metamorphosis?

1. exoskeleton
2. endoskeleton
3. liquid skeleton

What are bones not made of?

1. collagen
2. phosphorus
3. calcium
4. sulfur

What type of skeleton do Octopi have?

1. endoskeleton
2. exoskeleton
3. liquid skeleton

What type of skeleton do scorpions have?

1. endoskeleton
2. exoskeleton
3. liquid skeleton

What type of skeleton do snakes have?

1. endoskeleton
2. exoskeleton
3. liquid skeleton

What type of skeleton do we have?

1. endoskeleton
2. exoskeleton
3. liquid skeleton