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Groups of cells that work together

Tissues

1

Study of tissues

Histology

2

4 types of tissues:

Epithelial
Connective
Muscle
Neural

3

What covers the surface inside and out

Epithelial

4

Secrete waste products and hormones

Glandular

5

Characteristics of epithelial tissue

Cellularity (tightly packed cells)
Attachment
Avascular
Regenerative

6

Functions of epithelial tissue:

Protects from impact of friction
Controls what enters and leaves
Provides sensation
Creates secreations

7

2 regions of epithelial cell:

Basolateral-bottom, deep-connects to underling tissues

Apical-surface

8

Part that is exposed to surface

Apical

9

Structures of epithelia:

Microvilli-increased surface area for absorption

Stereocilia-

Ciliated epithilium-

10

What are the shapes of the epithelia?

Squamous-flat
Cuboidal-square
Columnar-rectangular

11

What are the layers in the epithelia?

Simple-secretes and absorbs
Stratified-many layers

12

Simple squamous-

Stratified squamous-

Secretes and absorbs (ex:lung)

Multiple layers of flat cells (Ex:skin)

13

-Single layer of square cells (glands,ducts); limited protections, sensation, absorption

-Protection, many layers (ex:lining of ducts)

-change in thickness due to stretching (ex:urinary bladder)

Simple cuboidal-

Stratified cuboidal-

Transitional cuboidal

14

-single layer of rectangular cells secretes and absorbs (ex:lining of small intestines)

-single layer but looks layered, many different cells mixed together (ex:trachea)

-protections, multiple layers of abrasion (ex:salivary gland, ducts)

Simple columnar

Pseudostatified

Stratified columnar

15

-Secretes Hormones to the inside of the body, no glandular ducts.

-regulate and coordinate body activities.

-example:pancreas, thyroid gland, pituitary gland, adrinal glands

Endocrine
Hormones

16

Release material to the outside of the body; have ducts.

-ex:sweat gland, oil glands, tear ducts

Exocrine

17

Modes of secretions:
-no cell damage, release sac/vesicles of material
-release materials with some cytoplasm; cell survives
-cell explodes/destroyed when released (ex:hair and skin)

Merocrine
Apocrine
Holocrine

18

Types of secretion:
-usually enzymes;water secretion
-thick lubricator
-watery with lubricator as a combination

Serous
Mucous
Mixed

19

What are the 3 parts all connective tissues have?

1)specialized cell
2)fiber
3)ground substance

20

Functions of connective tissue:

Framework-bones
Transports-blood
Protects-cartilage, bone, fat
Supports other tissues
Stores energy
Defines against infection

21

Has a thick ground substance; many different types of cells and fibers
Example:fats, tendons, ligaments

Connective tissue proper

22

Connective tissue proper can be:
A) fibers create loose, open framework (fat)
B) fibers densely packed

Loose
Dense

23

Watery matrix, specific cells;protects and supports;
*_____~contained in circulatory system
*____~contained in the lymphatic system

Fluid connective tissue
Blood
Lymph

24

Support and densely packed fibers
*____~solid, rubbery matrix
*____~solid, crystalline matrix

Supporting connective tissue
Cartilage
Bone

25

Deep, connects to underlining tissues

Basolateral

26

What are the structures of epithelial cell?

Microvilli
Stereocilia
Ciliatated epithilium

27

Small, increased surface area for absorption

Microvilli

28

Large, picks up vibration in ears

Stereocilia

29

Medium, (cilia), moved stuff on surface of cell

Ciliated epithilium