Types Of Skeletons

Question 1

All animals need to ________ their bodies. They also need to ______ about. Most animals need a supporting framework they need a _________.

Answer 1

Support
Move
Skeleton

Question 2

What are the 3 things skeletons are used for?

Answer 2

• Supporting the body and giving it shape.
• Protecting soft parts of the body
• Moving the body with the help of muscles

Question 3

What is a Hydrostatic skeleton?

Answer 3

A fluid-filled internal body cavity in which the fluid is held under pressure.

Question 4

What is the cavity inside the hydrostatic skeleton surrounded by?

Answer 4

Surrounded by muscles arranged in layers

Question 5

How does the hydrostatic skeleton allow the animals to move?

Answer 5

The body shape of the animal changes as these muscles contract and relax. Change in shape allows for movement.

Question 6

How does the hydrostatic skeleton protect the animal?

Answer 6

The animals are soft and flexible, the hydrostatic fluid does protect body parts by acting as a shock absorber.

Question 7

How does a jellyfish support its body and move about?

Answer 7

• Its soft body is filled with water.
• It moves its muscles against the water.
• This opens and closes its umbrella. So it propels itself along.

Question 8

How does a worm support its body and move about?

Answer 8

• Worms also have a liquid skeleton. The liquid is trapped in spaces inside the body. The muscles squeeze against the liquid. This keeps the body firm.
• Muscles can squeeze in different parts of the worm’s body.
• This changes its shape and helps it to move along.

Question 9

What is an exoskeleton?

Answer 9

A rigid outer covering usually made up of protein. Chitins and Calcium Salt.

Question 10

The exoskeleton is ________/_______=

Answer 10

Jointed/Hinged

Certain points of the skeleton are flexible and can bend enabling movement.

Question 11

What do exoskeletons restrict? And what must they do to overcome this?

Answer 11

They restrict growth and The exoskeleton must be shed from time to time in order for the animal to grow. They need to mount.

Question 12

What is metamorphosis?

Answer 12

Change in body form as an animal grows

Question 13

What is an endoskeleton?

Answer 13

Found in the bodies of all vertebrates including fish,amphibians and birds and they consist of hard skeletons of bones and cartilage found inside the body-made up of calcium and phosphate.

Question 14

How does the endoskeleton move?

Answer 14

Works with the muscular system to perform movement and locomotion. It supports the body and protect the organs.

Question 15

All vertebrate skeletons have the same basic parts:(5)

Answer 15

• Skull (brain)
• Backbone (Small bones called vertebrates)
• Ribcage (thorax)
• Limbs (arms and legs)
• Limb girdles (shoulders and hips)