Connective Tissues

Forms of Connective Tissue

Connective tissue proper

Forms of Connective Tissue

Special connective tissues

Forms of Connective Tissue

Supporting (skeletal) connective tissues

Functions of Connective Tissue

Ground Substance

Loose irregular (areolar) CT

Fibers 1. COLLAGEN

DENSE irregular connective tissue

Type I Collagen:

Type II Collagen

Type IV Collagen

Dense REGULAR connective tissue:

TENDON

(made by fibroblasts + collagen + ground substance)

*very straight, matrix of proteins

Defense cells in connective tissue

Resident, intrinsic, or fixed cells:

Defense cells in connective tissue

Migrating or wandering cells

After tissue injury, macrophages in regional lymph node engulf erythrocytes (RBC's)

MACROPHAGES

*main function = Phagocytose
(resident cell)

MAST Cells

Main function: release histamine via granules

(resident cell)

Plasma Cells

Main function: antibody production

(differentiated B cells)

Resident cells

(clock-face nucleus and clearing indicating Golgi)

Fat cells
(Adipose Tissue)

2 Types:

1. Unilocular (yellow/white fat)

2. Multilocular (brown fat)

Fat cells
(Adipose Tissue)

1. Unilocular (yellow/white fat)

Fat cells
(Adipose Tissue)

2. Multilocular (brown fat)

HEAT generation

CARTILAGE

Type II Collagen

-Two types:

Elastic & Hyalin Cartilage

Hyaline Cartilage

(in the NOSE)

Type II Cartilage

-surrounded by chondroblasts, then there are perichondrial fibroblasts around the chondroblasts

Perichondrium

and

Cartilage Matrix

Joint Space / Articular Cartilage

(empty space = synovial fluid)

**LACKS perichondria fibroblasts & chondroblasts

(Cannot regenerate - painful: because underlying bone!)

Elastic Cartilage

(Epiglottis, part of the ear)

-basically hyalin cartilage BUT has a fibrous look, a form of elastic fibers

Fibrocartilage

**Contains both Types Collagen I and II

(cells lined up in rows - pattern present)

EXAM Question:

Hyaline Cartilage is composed of:

A. Elastic Fibers

B. Collagen I

C. Collagen II

D. Adipose Cells