lab 6 bones

Question 1

where bone and marrow replace a preexisting hyaline cartilage template or anlagen of future bone

Answer 1

Endochondral ossification (EO)

Question 2

where bone is deposited directly within primitive connective tissue or mesenchyme

Answer 2

Intramembranous ossification (IO)

Question 3

two type of bone formation

Answer 3

Intramembranous ossification (IO)
Endochondral ossification (EO),

Question 4

In both cases, a primary or immature bone is first laid down, and is then transformed (“remodeled”) into ____bone.

Answer 4

mature

Question 5

EO makes ___ bone

Answer 5

Cancellous
spongy
trabecular

Question 6

IO makes ___ bone

Answer 6

Compact
dense
cortical (periosteal)

Question 7

___ bone is designed for a supportive and weight- bearing role.

Answer 7

compact
dense
cortical

Question 8

What kind of bone is web-like and porous, is surrounded by bone marrow, and likely provides appropriate niches for blood cell development in the marrow cavity?

Answer 8

EO bone

Cancellous (also called spongy or trabecular)

Question 9

ECM on bone

Answer 9

type 1 collagen
amorphous ground substance: small, non-sulfated proteoglycans

ECM mineralized, very hard

Question 10

the calcium salts of the ECM of bone are in the form of crystals called ____

Answer 10

hydroxyapatites.

Question 11

bone cells

Answer 11

osteocytes

Question 12

__ bone is found in such regions as the shaft of long bones, and many cranial bones.

Answer 12

compact

IO bone

Question 13

IO bone main function is

Answer 13

supportive and weight-bearing role

Question 14

basic unit of compact bone

Answer 14

osteon (haversian system)

Question 15

concentric rings of bone ECM are called

Answer 15

lamellae

Question 16

central canal of an osteon

Answer 16

Haversian Canal

Question 17

Small, concentrically arrayed holes surrounding the Haversian canal represent ___

Answer 17

osteocyte lacunae.

Question 18

tiny projections resembling spider webs radiate from the lacunae are ___

Answer 18

canaliculi

Question 19

in life Haversian Canal’s contain ___

Answer 19

blood vessels, nerves and areolar connective tissue

Question 20

fine cell processes of osteocytes to allow them to interact with each other

Answer 20

filopodia

Question 21

Haversian canals run parallel to the long axis of the bone. They are interconnected by transverse or oblique canals called ___

Answer 21

Volkmann Canal

Question 22

the space in between osteons are ___

Answer 22

interstitial lamellae, old bone/old osteons that have been partially removed

Question 23

cancellous bone is derived by ___

Answer 23

EO

cancellous, spongy, trabecular

Question 24

This term is applied when bone development occurs directly within or below a connective tissue membrane.

Answer 24

Intramembranous Ossification

Question 25

Most flat bones, e.g., frontal, parietal, dentary and maxilla, arise by ___

Answer 25

Intramembranous Ossification

Question 26

explain IO formation

Answer 26

Within the mesenchyme (connective tissue membrane) of the embryo where a flat bone is to appear, osteoblasts will secrete bone matrix in the form of spicules. These enlarge into trabeculae (slightly larger than spicules), which fuse together, forming a 3-D latticework as the bone grows and develops to its final size and form

Question 27

The layer of pale matrix that is seen lining the spicules of IO bone; this ECM is still uncalcified and is called ____

Answer 27

osteoid

Question 28

Answer 28

1. Haversian canal 2. Haversian canal connecting to a Volkmann's canal 3. Osteocyte lacuna 4. Interstitial lamellae 5. Osteon

Question 29

Answer 29

Compact bone 1. Concentric lamellae 2. Haversian canal 3. Canaliculi 4. Interstitial lamellae 5. Osteocyte lacuna

Question 30

Answer 30

1. Tendon 2. Periosteum 3. Compact bone 4. Marrow cavity

Question 31

Answer 31

1. Tendon 2. Periosteum 3. Haversian canal 4. Osteocytes

Question 32

Answer 32

Sternebra 1. Compact bone 2. Trabecular bone 3. Bone marrow cavity 4. Potential Fibrocartilage 5. Future Costal Cartilage 6. Muscle 7. Bone and Bone Marrow

Question 33

Answer 33

EO 1. Zone of proliferation (zone of multiplication) 2. Zone of hypertrophy 3. Zone of degradation (zone of calcification) 4. Zone of ossification

Question 34

Answer 34

1. Intramembranous bone

Question 35

Answer 35

1. Intramembranous bone | 2. Osteoblasts

Question 36

Answer 36

1. Intramembranous bone | 2. Osteoblasts

Question 37

compact bone

Answer 37

Question 38

what is this

Answer 38

Question 39

label

Answer 39

Question 40

what is the weird shaped area?

Answer 40

interstitial lamella

Question 41

what are the white spaces? | What is the arrow pointing to?

Answer 41

``` Haversian Canals (longitudinal) osteocyte in a lacunae ```

Question 42

arrows?

Answer 42

top arrow osteocyte (bone cell) bottom arrow osteoclast (eat bone) white space- bone marrow with red blood cells

Question 43

what is the blue what is the white what is the pink

Answer 43

blue bone white bone marrow and red blood cells pink osteoclasts (eat bone, multinucleated)

Question 44

what is this?

Answer 44

Question 45

what are the arrows? | what is the ball on the right?

Answer 45

developing membrane bone (spincule) osteoblast (make bone) young hypercellular cartilage)

Question 46

arrows?

Answer 46

Question 47

Answer 47

blue: harversion canal purple: lacunae green: osteocyte

Question 48

the pale purple part? the pink part? the spotted part?

Answer 48

pale purple is cartilage back bone pink part: new bone spotted: marrow and red blood cells

Question 49

Answer 49

osteoclast: multinucleated, pink eating bone

Question 50

whole in center | long hole?

Answer 50

haversian canal | volkmans canal

Question 51

Answer 51

IO bone being formed pink is bone osteoblasts surround bone