TYPES OF SKELETONS

What serves living things with support, movement and protection?

• Bone

• Muscles

• Skeleton

• Tendons

What is a major difference between a hydrostatic skeleton and an endoskeleton?

• A hydrostatic skeleton is located inside the body and the endoskeleton outside.

• A hydrostatic skeleton is found in worms and an endoskeleton in invertebrates.

• An endoskeleton is located inside of the bodies of vertebrates and are composed of bone, while hydrostatic skeletons are fluid filled skeletons.

• Both ( option 1 and 2)

Which type of skeleton does a snail posses?

• Endoskeleton

• Hydrostatic skeleton

• Exoskeleton

• Both ( hydrostatic skeleton and exoskeleton)

What is the exoskeleton made of ?

• Bone

• Chitin

• Fluid

• None of the above

Identify the type of skeleton that the following animal possesses and at least one advantage and disadvantage. (APP)

• Exoskeleton. Adv: Reduces water loss disadvantage: the growth of the animal is limited.

• Hydrostatic skeleton: advantage: does not require any specialized support structures dis: the animal has to moult in order to grow.

• Endoskeleton. Adv: protects internal organs. dis: takes a long time to repair.

• Hydrostatic skeleton. Adv: does not require attachment for muscles. dis: limited in size and speed.

What is the role that chitin plays in an exoskeleton?

• It fills the body cells and cavities in the body.

• It enables the exoskeleton to grow and stretch.

• It forms body plates with flexible joints which allows for muscle attachment.

• None of the above.

The main skeletons types are classified as ...

• Endoskeleton (opt. 1)

• Exoskeleton (opt.2)

• Human skeleton (opt.3)

• Hydrostatic skeletons (opt.4)

• Options ( 1,2,4)

Hydrostatic skeletons occur in...

• Flatworms, roundworms, earthworms, starfish and slugs.

• Frogs and newts.

• Insects, spiders, scorpions and crabs.

• All of the above.

Lack of protection is a disadvantage for which skeleton type? (ANA)

• Endoskeleton

• Hydrostatic skeleton

• Exoskeleton

• None of the above

What characteristics supports exoskeleton?

• Limits the size of the animals.

• Great flexibility.

• Bones can vary in size to support mass.

• Fluid shape.