Epithelia, Glands And Skin Flashcards Preview

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Flashcards in Epithelia, Glands And Skin Deck (46)
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1

Where are Mucous membranes?

line internal tubes which open to the exterior e.g. respiratory tract

2

What are Mucous membranes made from?

epithelium, lamina propria (adjacent layer of connective tissue), muscular mucosae (alimentary tract made of smooth muscle)

3

What are Serous membranes?

thin, two part membranes that line certain body cavities, secrete lubricating fluid for friction free movement e.g. peritoneum

4

What are Serous membranes made from?

Simple squamous epithelium (secretes lubricating fluid) and a thin layer of connective tissue

5

How do the heart, lungs and gut become surrounded by serous membrane?

develop next to bag like cavities when embryo and invaginate so become surrounded

6

What are Epithelia?

sheets of contiguous cells that cover the external surface of the body and line internal surfaces

7

What does simple epithelia mean?

one cell layer

8

What does stratified epithelia mean?

more than one cell layer

9

What is the function of simple squamous cells?

Lubrication
Gas exchange
barrier
active transport by pinocytosis

10

Where are simple squamous cells?

Air sacs of the lungs, blood and lymph vessels, kidney, lining of body cavities

11

What is the function of simple cuboidal cell?

Secretes and absorbs, barrier and hormone synthesis in thyroid

12

Where are simple cuboidal cells found?

in ducts and secretory portions of the small glands, thyroid follicles and kidney tubules, ovary

13

What is the function of simple columnar cells?

Absorbs
Secretes mucous and enzymes, lubrcation, transport

14

Where are simple columnar cells found?

ciliated tissues in bronchi, uterine tubes, uterus and non ciliated in digestive tract and bladder

15

What is the function of pseudosatisifed columnar epithelium?

Secretes mucus, ciliated move mucus

16

Where are pseudosatisifed columnar epithelium found?

Trachea and upper respiratory tract

17

Where are Stratisfied squamous epithelium found

Lines the esophagus, mouth and vagina

18

What is the function of stratified squamous epithelium?

protects against abrasion, reduces water loss

19

What is the function of stratified cuboidal epithelium?

protective tissue

20

Where are stratified cuboidal epithelium found?

Sweat glands, salivary glands and mammary glands

21

What is the function of stratified columnar epithelium?

Secreted and protects

22

Where is stratified columnar epithelium found?

The male Urethra and ducts of some glands

23

Where is transitional epithelium and what is its function?

Allows urinary organs to expand and stretch e.g. bladder, urethra and ureters

24

What are squamous cells shaped like?

Cells are wider than there height

25

What are cuboidal cells shaped like?

Height and width are the same

26

What are columnar cells shaped like?

Height is greater than width

27

What is the basement membrane?

Strong flexible layer what the epithelial cells adhere to

28

What type of cell forms the skin epidermis?

Keratinised stratified squamous epithelium

29

What are the four layers of the epidermis?

Horny layer
Granular layer
Prickle cell layer
Basal layer

30

What occurs in the basal layer?

Keratinocyte mitosis