A&P - Chapter 11 (Part 3)

Question 1

What is the inner portion of flat/other bones called?

Answer 1

Cancellous bone

- covered on the outside with compact bone

Question 2

What do cranial flat bones have? (2)

Answer 2

1. An internal and external table of compact bone

2. Diploe

Question 3

Diploe

Answer 3

Inner cancellous region

- between the internal and external table

Question 4

What do flat bones, short bones and irregular bones have similar features to?

Answer 4

Cranial bones

Question 5

What is filled in the spaces inside the cancellous bone of short, flat, irregular and sesamoid bone?

Answer 5

Red marrow

Question 6

What are 2 major types of connective tissue that make up the skeletal system?

Answer 6

1. Bones

2. Cartilage

Question 7

What is in bones and cartilage more than cells?

Answer 7

Matrix

Question 8

What do bones contain? (3)

Answer 8

1. Blood
2. Adipose
3. Nervous tissues

Question 9

What part of the bone makes the blood?

Answer 9

The spongy part

- contains bone marrow

Question 10

What are 2 types of bones in the skeletal system?

Answer 10

1. Compact bone

2. Spongy bone

Question 11

Where do you find compact bone?

Answer 11

In the outer layer

- hard and dense

Question 12

What percentage does compact bone make up of total bone mass?

Answer 12

80%

Question 13

Where do you find spongy bone?

Answer 13

In the ends of long bones

- epiphyses

Question 14

What percentage does spongy bone make up of total bone mass?

Answer 14

20%

Question 15

Osteons

Answer 15

Are cylindrical structural units

Question 16

What is another word for osteons?

Answer 16

Haversian systems

Question 17

How are matrix’s arranged?

Answer 17

They are calcified and arranged in rings

Question 18

What do matrix’s surround?

Answer 18

The central canal

Question 19

What does the central canal contain?

Answer 19

Blood vessels

Question 20

Concentric lamella

Answer 20

Calcified rings

Question 21

Lacunae

Answer 21

Are the spaces within the hard layers of concentric lamella

Question 22

What do you find in lacunae?

Answer 22

Osteocytes

- living bones

Question 23

What are lacunae connected by?

Answer 23

Canaliculi

Question 24

Canaliculi

Answer 24

Tiny canals

Question 25

What do canaliculi connect with?

Answer 25

The central canal in each osteon

Question 26

What happens when canaliculi is connected to the central canal in each osteon?

Answer 26

Nutrients gets from the blood to the osteocytes

Question 27

Trabeculae

Answer 27

Thin threads that lead to a porous texture

Question 28

Where do you find trabeculae?

Answer 28

In spongy bone

Question 29

What is the trabeculae surrounded by?

Answer 29

A network of open spaces that may contain red bone marrow

Question 30

Where are nutrients delivered to?

Answer 30

Spongy bone

Question 31

How is waste removed from cells?

Answer 31

Via diffusion through tiny canaliculi

Question 32

Why are trabecula arranged along the lines of stress in spongy bone?

Answer 32

To enhance the bones strength