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Flashcards in Microanatomy Labs Deck (26)
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1
Q
Sebaceous Glands
A
Found in reticular layer of dermis. Usually associated with a hair follicle
2
Q
Pacinian corpuscle
A
Onion-like touch and pressure receptor. Found
3
Q
Rete Pegs
A
Increase SA between epidermis and dermis
4
Q
perichondrium
A
Fibrous layer lining cartilage of developing bone
5
Q
Where would you find sweat glands?
A
Clustered between the reticular and hypodermis (subcutaneous) layers
6
Q
What are the five layers of the Epidermis
A
Stratum Corneum (sheds)
Stratum Lucidum (clear)
Stratum Granulosum (flattened cells)
Stratum Spinosum (rounded)
Stratum Germinativum (oval)
7
Q
What type of CT is dermis
A
Dense irregular CT
8
Q
What makes up the dermis
A
Papillary- fine collagen fibres, loosely arranged
Reticular- Thicker bundles of fibres
9
Q
What mainly makes up hypodermis
A
adipose tissue
10
Q
Describe a Hypotrophic Scar
A
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
Q
What is though to help hypotrophic scars?
A
Pressure therapy
12
Q
In a histology slide of bone what dont we see?
A
Hydroxyapitite as it was removed by the staining proccess
13
Q
Where will you see a developing primary osteon?
A
On the periosteal surface with blood vessel being incorporated into the bone
14
Q
Structure of developing fetal vertebrae
A
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
Q
What are the zones of epiphyseal plates
A
1) Zone of resting cartilage
2) Zone of Proliferation
3) Zone of Maturation/ hypertrophy
4) Zone of Reabsorbtion/ossification/calcification
16
Q
Whats epiphyseal closure?
A
Evetually rate of replacement exceeds rate of growth. All that is left is epiphyseal line
17
Q
Purpose of Dura mater
A
To protect the column, especially posteriorally, so that leaning forwards is okay. offers resistance during injections
18
Q
Where do you find CSF
A
Sub-arachnoid space
19
Q
Where SHOULD you inject then?
A
into the epidural space, outside of the dura mater.
20
Q
Narrow transition zone
A
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
Q
What makes up a Nucleus Pulposus
A
Gelatinous centre filled with PG and hyaluronon. Filled with water an has a few fine collagen fibres
22
Q
What makes up an annulus fibrosus
A
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
Q
What happens to the NP, AF, fibrocartilage and cartilagenous plates with age
A
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
Q
What does the fibrocartilage look like?
A
Rows of pink chrondocytes with blue collagen fibres in between.
25
Q
Synovium?
A
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
Q
You wont find calcium(red staining) around the chondrocytes. What is this called?
A
Territorial region, to protect from calcification.