Unit 1: Bones

What are the 5 functions of bones ?

1. Suport

2. Mineral storage

3. Blood cell production

4. Protection

5. Leverage

What are the 4 shapes that bones are categorized in?

1. Long

2. Flat

3. Short

4. Irregular

Bones are made up of 2 compositions. What are they?

Inoragnic and Organic

Types of bone tissue

Cortical (compact) and Trabecular (spongy)

What are the 2 insertion sites for a IO needle ?

Greater tubercle and Sterum on the manubrium

Why would a someone choose to insert fluids and medications via IO needle

Because the patient is severely dehydrated or in cardiac shock/arrest

What is the fundamental functional unit of compact bone?

An Osteon

What does an Osteoblast do?

Make new bone matrix

What does an Osteocyte used for?

Mature bone cells that maintain bone structure

What are Osteoclasts ?

They are multi nuclei cells that secrete enzymes that break down bone matrix

How do Osteocytes communicate with each other?

Through Canaliculi

What causes an Osteocyte to die ?

1. Senescence

2. Necrosis

3. Apoptosis

4. Osteoclastic engulfment

What is senescence?

Old age of the cell

What is Necrosis?

Tissue death

What is Apoptosis

Cellular suicide

What is Osteoclastic engulfment ?

When the Osteoclasts engulfs the osteocyte

What happens when you have Osteoporosis?

Your bone resorption is greater than bone formation, meaning you have more osteoclast than you do osteoblasts within the bone

The Lacuna hosts what ?

The osteocyte.