Types of skeletons - 4B

What serves living things with support, movement and protection? (REM)

• Bone

• Muscles

• Skeleton

• Tendons

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

• 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? (UND)

• Endoskeleton

• Hydrostatic skeleton

• Exoskeleton

• Both ( hydrostatic skeleton and exoskeleton)

What is the exoskeleton made of ? (REM)

• Bone

• Chitin

• Fluid

• None of the above

Muscle movement in exoskeletons and hydrostatic skeletons are compared as follows: (APP)

• Body plates with flexible joints are formed with flexible joints, the animal's muscles attach to the exoskeleton and allows it to control its movement. While in hydrostatic skeletons, muscles contact setting up a pressure in the fluid.

• in hydrostatic skeletons flexible joints forms, muscles attach to the skeleton and allows it to control its movement. In exoskeletons muscles contract and a pressure is set up allowing the animal to move.

• None of the above.

• Both.

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 size 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? (UND)

• 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 ... (REM)

• Endoskeleton (opt. 1)

• Exoskeleton (opt.2)

• Human skeleton (opt.3)

• Hydrostatic skeletons (opt.4)

• Options ( 1,2,4)

The vertebral column in endoskeletons provides protection for animals in the following way: (APP)

• Protects the central nerve cord.

• Allows for muscles to act against it to support the animal and allow it move and escape danger.

• None of the above

• All of the above.

Hydrostatic skeletons occur in... (ANA)

• Flatworms, roundworms, earthworms, starfish and slugs.

• Frogs and newts.

• Insects, spiders, scorpions and crabs.

• All of the above.