Skeletal System

Question 1

A water-based skeleton (___________) provides the structure necessary for movement in worms.

Answer 1

Hydrostatic

Question 2

The hard external skeleton (___________) not only provides a protective mechanism for many organisms but also assists in movement of insects.

Answer 2

Exoskeleton

Question 3

The internal skeleton (____________) present in many animals provides the structural network for support, protection, and movement.

Answer 3

Endoskeleton

Question 4

___________ skeletons do not contain hard structures, such as bone, for muscles to pull against. Rather, the muscles surround a fluid-filled body cavity.

Answer 4

Hydrostatic Skeleton

Question 5

The most common skeletal system used by animals for movement and support.

Answer 5

Hydrostatic Skeleton

Question 6

Invertebrate animals that have jointed limbs, a segmented body, and an exoskeleton.

Answer 6

Arthropods

Question 7

Exists in arthropods and mollusks.

Answer 7

Exoskeleton

Question 8

Vertebrates have an internal skeleton called the ____________, a framework of bones and cartilage.

Answer 8

Endoskeleton

Question 9

____________ is a framework of bones and cartilage.

Answer 9

Endoskeleton

Question 10

Bone contains concentric rings of tissue in which bone cells called ___________ produce the inorganic materials (fibers and matrix) of bone.

Answer 10

Osteoblasts

Question 11

Living, mature bone cells called __________ are also located in the bone. Bone-destroying cells called ___________ break down bone, thus providing a turnover of bone material needed in other areas.

Answer 11

Osteocytes - Osteoclasts

Question 12

The combination of bone cells and bone tissue comprises a unit called a _________ system.

Answer 12

Haversian System

Question 13

Tough, fibrous tissues, known as _________, link bones to one another.

Answer 13

Ligaments

Question 14

Connective tissues, called _______, attach muscles to bones.

Answer 14

Tendons