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Flashcards in Microanatomy Labs Deck (26):
1

Sebaceous Glands

Found in reticular layer of dermis. Usually associated with a hair follicle

2

Pacinian corpuscle

Onion-like touch and pressure receptor. Found

3

Rete Pegs

Increase SA between epidermis and dermis

4

perichondrium

Fibrous layer lining cartilage of developing bone

5

Where would you find sweat glands?

Clustered between the reticular and hypodermis (subcutaneous) layers

6

What are the five layers of the Epidermis

Stratum Corneum (sheds)
Stratum Lucidum (clear)
Stratum Granulosum (flattened cells)
Stratum Spinosum (rounded)
Stratum Germinativum (oval)

7

What type of CT is dermis

Dense irregular CT

8

What makes up the dermis

Papillary- fine collagen fibres, loosely arranged
Reticular- Thicker bundles of fibres

9

What mainly makes up hypodermis

adipose tissue

10

Describe a Hypotrophic Scar

Thick collagenous bands of collagen fibres with elongated cells that represent a tendon. These are under tension and surround/compress a central region of disorganised collagen fibres, with cells that resemble fibrocartilage.

11

What is though to help hypotrophic scars?

Pressure therapy

12

In a histology slide of bone what dont we see?

Hydroxyapitite as it was removed by the staining proccess

13

Where will you see a developing primary osteon?

On the periosteal surface with blood vessel being incorporated into the bone

14

Structure of developing fetal vertebrae

Show endochondral ossification. There is a centre of ossification and developing bone surrounded by hyaline cartilage. The cells of the cartilage undergo hypertrophy and die, and are follwed by vasculature and osteoblast activity, where new bone is laid down over CF and matrix.

15

What are the zones of epiphyseal plates

1) Zone of resting cartilage
2) Zone of Proliferation
3) Zone of Maturation/ hypertrophy
4) Zone of Reabsorbtion/ossification/calcification

16

Whats epiphyseal closure?

Evetually rate of replacement exceeds rate of growth. All that is left is epiphyseal line

17

Purpose of Dura mater

To protect the column, especially posteriorally, so that leaning forwards is okay. offers resistance during injections

18

Where do you find CSF

Sub-arachnoid space

19

Where SHOULD you inject then?

into the epidural space, outside of the dura mater.

20

Narrow transition zone

Between annulus fibrosus and periphery of cartilage plates. Due to a change in mechanical forces and the need to resist both tension and pressure

21

What makes up a Nucleus Pulposus

Gelatinous centre filled with PG and hyaluronon. Filled with water an has a few fine collagen fibres

22

What makes up an annulus fibrosus

Collagen fibres runnin at right angles, Dense regular fibrous CT. Outer fibres arranged almost vertically,, and towards the centre become more orthogonal (lamellar like)

23

What happens to the NP, AF, fibrocartilage and cartilagenous plates with age

NP= more collagen fibres, less defined gelatinous centre
AF= dense, compact and in some places fractured.
fibrocartilage= less chondrocytes
Plates= deposits of red staining calcium and less trabeculae adjacent to the plates.

24

What does the fibrocartilage look like?

Rows of pink chrondocytes with blue collagen fibres in between.

25

Synovium?

Pocket continuous with the joint space that produces synovial fluid. Doesn't cover articular cartilage. This fluid intake/outake is equal, otherwise swelling would occur.
With age synovium thickens

26

You wont find calcium(red staining) around the chondrocytes. What is this called?

Territorial region, to protect from calcification.