chapter 31 quiz Flashcards Preview

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1

Tissues are

Collections of specialized cells of the same or a similar type that perform a common function in the body

2

The four tissue types are:

Epithelial
Connective
Muscular
Nervous

3

Epithelial Tissue (epithelium)

Forms a continuous layer over body surfaces
Lines body cavities
Forms glands

4

Epithelial cells may be connected to one another by

Tight junctions
Adhesion junctions
Gap junctions

5

Functions of Epithelial tissue

Protection
Secretion
Absorption
Excretion
Filtration

6

Simple Epithelia

A single layer of cells

7

Simple Epithelia is Classified according to cell type

Squamous epithelium
Cuboidal epithelium
Columnar epithelium

8

Squamous epithelium

flattened cells

9

Cuboidal epithelium

cubed shaped cells

10

Columnar epithelium

cells representing columns

11

Stratified Epithelia

Layers of cells

12

Glandular Epithelia

Secretes a product

13

gland

can be a single epithelial cell or can contain many cells.

14

Exocrine glands

Secrete products into ducts or cavities

15

Endocrine glands

Secrete products internally so they are transported into the bloodstream

16

Connective tissue

Diverse in structure and function but all types have
Specialized cells
Ground substance – Noncellular material
Protein fibers

17

Collagen fibers

contain collagen providing strength and flexibility

18

Reticular fibers

contain thin, highly branched collagen fibers

19

Elastic fibers

contain elastin, not as strong but more elastic than collagen

20

connective matrix

ground substance plus fibers

21

Three categories of connective tissue are

Fibrous
Supportive
Fluid

22

Fibrous Connective Tissue

Consists of:
Fibroblast cells
A jellylike matrix containing collagen and elastic fibers

23

Loose fibrous connective tissue

Allows organs to expand
Supports epithelium and many internal organs
Forms protective covering over internal organs

24

Adipose tissue

Stores energy
Insulates the body and provides padding
Mostly white, but brown in newborns due to increased numbers of mitochondria

25

Dense fibrous connective tissue

Strong connective tissue
Tendons – connect muscle to bone
Ligaments – connect bones to other bones at joints

26

Supportive Connective Tissue

Cartilage
Bone

27

Cartilage

Classified according to type of collagen and elastic fibers found in the matrix (hyaline cartilage, elastic cartilage, fibrocartilage)
Cartilage cells lie in small chambers (lacuna) in the matrix.
Cartilage lacks a direct blood supply and heals very slowly.

28

Hyaline

Consists of very fine collagen fibers
Matrix is translucent
Found in nose and ends of long bones and ribs

29

Elastic

More elastic fibers than hyaline
More flexible
Found in framework of outer ear

30

Fibrocartilage

Matrix contains strong collagen fibers
Found in structures that withstand tension and pressure
Found in pads between vertebrae in backbone