Skeletal System

Match

Match the following

• inside

• cartilage

• bone

• making

• cytes

endo

chond

os

fication

cells

• endo

• chond

• os

• fication

• cells

Fill in the Blank

__________ form a model where bone will enventually be.

Fill in the Blank

The model that eventually becomes bone is made of ________ __________.

Fill in the Blank

A membrane called the ________ forms around the cartilage model.

Fill in the Blank

Eventually the perichondrium becomes bone to form the ____________.

Fill in the Blank

Once blood vessels enter the center of the diaphysis the ________ _________ _________ forms.

Fill in the Blank

Once a blood supply is establiched, _________ begin building osteoid in the primary ossification center.

Fill in the Blank

Ossification of the _________ occurs from the inside out starting at the primary ossification center.

Fill in the Blank

The _________ __________ is formed inside the diaphysis by osteoclasts.

Fill in the Blank

At birth, blood vessels enter the epiphysis which leads to the formation of the __________ _____________ _____________.

Fill in the Blank

Once ossification is complete the only cartilage remaining is the articular cartilage and the ____________ __________.

Reorder

Reorder the following events in the process of endochondral ossification.

• Chondrocytes create a model made of hyaline cartilage

• perichondrium ossifies to become periosteum

• ossification of the diaphysis occurs

• medullary cavity is formed by osteoclasts

• ossification of the epihysis occurs

1

2

3

4

5

• 1
• 2
• 3
• 4
• 5

Match

Match the following

• formation of osteoid at the diaphysis

• formation of osteoid at the epiphysis

• form the medullary cavity

• replace cartilage with osteoid

• form the cartilage model

primary ossification center

secondary ossification center

osteoclasts

osteoblasts

chondrocytes

• primary ossification center

• secondary ossification center

• osteoclasts

• osteoblasts

• chondrocytes

Fill in the Blank

After a fracture the realignment of broken bone ends is called ____________.

Fill in the Blank

Once the broken ends of bones are realigned, ___________ must occur in order for the bone to remain stable and have time to heal.

Fill in the Blank

The cartilage that connects the broken ends of bone is called a _____________.

Fill in the Blank

The soft callus is replaced with osteoid by the action of ___________.

Fill in the Blank

Excess bone callus is removed and the medullary cavity is hollowed out by the action of _____________.

Reorder

Reorder the following events in fracture repair.

• torn blood vessels lead to blood clots & the formation of a hematoma

• cartilage forms and connects the broken ends of bone

• osteoblasts replace cartilage with osteoid

• excess bone is removed & the medullary cavity is reformed

1

2

3

4

• 1
• 2
• 3
• 4

Categorize

Options (12)

blood clot

hematoma

torn blood vessels

soft callus formed

chondroblasts

ends of bones connected by cartilage

osteoblasts replace cartilage

hard callus formed

osteoid formed

osteoclasts remove excess bone

medullary cavity hollowed out

hard callus remodeled

Organize these options into the correct steps of fracture repair.

Step 1

Step 2

Step 3

Step 4