Week 2: Module 2: Integumentary System Flashcards Preview

BM1011 Physiological Systems > Week 2: Module 2: Integumentary System > Flashcards

Flashcards in Week 2: Module 2: Integumentary System Deck (24):
1

Name the three layers of the skin and what sort of tissue they are

Epidermis; epithelium, dermis:connective tissue, hypodermis:connective tissue insulator and food source

2

Describe the features of the epidermis

Epithelium, filled with keratin and waxy protein, living cells replaced every 35-45 days

3

Describe the base of the epidermis and function

cells at the base are living (stem cells) and are programmed to produce keratin, as they move away from source of food(base) they start to die, leaves keratin which is tough, non-polar and impermeable layer

4

Name the three cells in the epidermis

Melanocytes, tactile (merkel), dendritic cells

5

Describe the melanocyte cells and where are they

In epidermis. It is a epithelial cell that makes melanin and is a protective cell type. Produces more when environment is increased in UV light

6

Describe the tacticle (merkel) cells and where are they

In epidermis.Epithelial cell, detects touch, connect to a neuron, is a sensory cell type

7

Describe the dendritic cells and where are they

In epidermis. Immune cells, detects invaders, monitors skin surface, connective tissue cells

8

What is the second layer of the skin

Dermis

9

Describe the dermis

Its the supportive layer, a lot of connective tissue, has neurons, blood vessels, receptors, hair follicles, sweat glands

10

What are the two layers of the dermis

Papillary and reticular

11

Describe the papillary layer and where is it

Dermis. 20% loose connective tissue, superficial, contains blood vessels

12

Describe the reticular layer and where it is

80% dense connective tissue, a lot of collagen . dermis

13

What is the inner most layer of the skin

Hypodermis

14

Describe the hypodermis

Subcutaneous layer, mainly adipose tissue, insulation

15

What are the four modalities of cutaneous sensations and where are most of them detected

Pressure, touch, temperature, pain. Most are detected in the dermis layer

16

What are pain receptors called

Nociceptors

17

What are the 4 Appendages of the skin

hair and hair follicles, nails, sweat glands, sebaceous glands

18

Main type of sweat glands

Eccrine: most numerous esp. palms, soles, forehead, water, ions.

19

Function of sweat glands

As heat is produced the body finds the most convenient way to secrete it - soles, etc. remove heat from core

20

Second type of sweat glands

Apocrine: axillary and anogenital, sweat +lipid+protein +bacteria - odour empties into hair follicles

21

What do sebaceous glands secrete

they secrete sebum, most secrete into follicles, oily, skin, softens hair and skin

22

Describe hair as an appendages of the skin

grows from hair follicles which are in the dermis. the follicle contains the hair root which has the stem cells from growing hair, melanocytes for colour and erector pill muscle for hair movement

23

Describe nails as an appendages of the skin

A development of the epidermis and are formed from a heavily keratinised hardened layer

24

Describe glands as an appendages of the skin

made from cuboidal epithelium. In skin they include: sweat glands. These include eccrine glands which are most numerous and apocrine which secrete sweat and oil and are responsible for body odour