tissue review - connective tissues · procedure to identify connective tissues •if it’s...

TISSUE REVIEW - connective tissues

• The following slides are from your text or other sources.

This will allow you to study tissues at home.

• You are also responsible for tissue slides that we view with

the microscope in class.

• Also study the tissue slides and pictures found in the PAL

CD or at www.masteringaandp.com

• know:

– name of the tissue

– the cells ; the matrix ; other structures

– the function of the tissue

– where it is found

procedure to identify connective tissues

• if it’s connective :

• is the matrix loose or dense arrangement of fibers?

– loose probably areolar

– loose, with many cells reticular

– large cells with nucleus at edge adipose

– under epithelial tissue areolar

– dense, parallel fibers dense regular (fibrous)

– dense, dark, parallel “ (elastic)

– dense, not parallel dense irregular c.t.

• what are the cells called?

• what function matches this structure?

• other connective tissues:

– chondrocytes in lacuna cartilage

• smooth matrix hyaline cartilage

• dark lines in matrix elastic cartilage

• cells in rows fibrocartilage

– osteons compact bone

– blood cells blood

areolar c.t.

mast cell fibroblast

fibroblast Mast cell

areolar ct

high power

areolar c.t. elastic fibers collagen fiber

areolar c.t. mast cell

ground substance occupies the space between cells, fibers

If it’s under epithelia, it’s probably areolar c.t.

in low power, areolar looks like this.

Adipose connective tissue

This is not

an empty

space. The

entire

cytoplasm

is filled

with

fats/lipids

Nucleus

Capillary Adipocyte

adipose

under the skin

reticular c.t. dark fibers + many cells

dense regular c.t.; found where?

elastic c.t. elastin fibers always stain dark

Dense fibrous irregular c.t.

Fibroblast

nuclei

Dense fibrous irregular

connective tissue

Collagen

fibers

not in a parallel

arrangement

hyaline cartilage chondrocytes in lacuna

hyaline cartilage if you see Chondrocytes in lacuna – it’s cartilage ;

if the matrix is smooth – it’s hyaline cartilage

hyaline cartilage

elastic cartilage

dark lines in the matrix

= elastin

Elastic Cartilage

Perichondrium

Chondrocyte in lacuna Elastic fibers

Elastic cartilage = cartilage with extra elastin fibers

in the matrix. Elastin appears very dark.

Collagen fibers Fibrocartilage

Chondrocytes in a lacunae

Fibrocartilage = cartilage with extra collagen fibers in the matrix. The

chondrocytes appear in striaight rows.

We are built with several tissues in the same organ, area:

dense irregular c.t. adipose c.t. gland