Bones and Joint Histology (and a few pics)

Question 1

What are the 3 bone cell types?

Answer 1

• Osteoblasts
• Osteocytes
• Osteoclasts

Question 2

What cell type is this?

Answer 2

Osteoblast

Question 3

When osteoblasts are done, they are surrounded by matrix (bone), and become???

Answer 3

Osteocytes

Question 4

What is this?

Answer 4

Osteocytes

Question 5

What cells are these?

Answer 5

Osteoclasts

Question 6

Label

Answer 6

A) Diaphysis

B) Metaphysis

C) Physis

D) Epiphhysis

E) MEdullary cavity

F) Cortical bone

G) Cancelllous bone

Question 7

What type of bone is all compact bone in general?

Answer 7

Lamellar

Question 8

What happens to newly formed bone to turn it into lamerllar bone?

Answer 8

•Newly formed bone is woven, and is REMODELED (by what?) into lamellar bone

Question 9

What type of bone is adult skeleton?

Answer 9

It is lamellar bone, which is organised into Haversian systems, aka osteons

Question 10

How is spongy bone organised?

Answer 10

Lamellar bone, but it is parallel (not osteons)

Question 11

What is this?

Answer 11

Haversian System or Osteon

Question 12

What is this?

Answer 12

Osteon

Question 13

What is this?

Answer 13

Osteon

Question 14

What is this?

Answer 14

Osteon

Question 15

What does this show?

Answer 15

This is a trabecula; half the bone is lamellar (L), half is woven (W)

Question 16

What are the 3 cartilage types?

Answer 16

• Hyaline
• Elastic
• Fibrocartilage

Question 17

What is this?

Answer 17

Hyaline Cartilage

Question 18

What is this?

Answer 18

Elastic cartilage

Question 19

What is this?

Answer 19

New fracture

Question 20

What is this?

Answer 20

Older fracture (2 weeks)

Question 21

What is wrong here?

Answer 21

Osteoarthritis

Question 22

What is wrong here?

Answer 22

Osteosarcoma (tends to happen around metaphysis of bones in cortical long bones)

Question 23

What is this and what is likely to be wrong here?

Answer 23

Rib with osteosarcoma with metastasis in the lung/liver

Question 24

What is wrong here?

Answer 24

Osteoarthritis

Question 25

What is likely to be wrong here?

Answer 25

Osteomyelitis likely from navel ill

Question 26

Where is hyaline cartilage found?

Answer 26

Hyaline cartilage exists on the ventral ends of ribs, in the larynx, trachea, and bronchi, and on the articulating surfaces of bones.

Question 27

Where is elastic cartilage found?

Answer 27

It is found in the epiglottis (part of the larynx), the pinnae (the external ear flaps of many mammals).

Question 28

Where is fibrocartilage cartilage found?

Answer 28

Fibrocartilage is found in the soft tissue-to-bone attachments, pubic symphysis, the anulus fibrosus of intervertebral discs, menisci, the triangular fibrocartilage and the TMJ