This document describes the different types of connective tissue proper, including loose areolar connective tissue found in the skin and serous membranes, reticular connective tissue stained brown by silver, mucous connective tissue in the umbilical cord and developing teeth, and mesenchymal connective tissue present during embryonic life. It also discusses adipose connective tissue, including white adipose tissue formed of unilocular fat cells found all over the body except certain areas, and brown adipose tissue formed of multilocular fat cells and brown in color. Finally, it covers dense connective tissue with abundant fibers and few cells and matrix, including dense irregular connective tissue in capsules and dermis, and dense regular

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2. Connective tissue proper
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3. 1- Loose areolar connective tissue
Structure
ALL CELLS mainly fibroblasts, fat cell, mast cell, macrophages
ALL FIBERS , collagen more than elastic and reticular fibers
Abundant watery matrix
Site
1- Skin
2- Lamina propria of the serous membranes 3Dr. M. Attia

4. 2- Reticular Connective tissue
Structure
 All The CT Cells mainly Reticular Cells
 All CT Fibers mainly Reticular Fibers
It is stained brown colour by silver stain
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5. 3- Mucous connective tissue
Structure
CT cells mainly fibroblast
CT fibers mainly collagen
Abundant jelly like matrix
SITE ( embryo)
1- Umbilical cord (wharton’s jelly)
2- Pulp of the developing teeth
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6. 4- Mesenchymal Connective tissue
Structure
Connective tissue cells
Connective tissue fibers
Jelly like matrix
It is present during embryonic life
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7. 5- Adipose connective tissue
It is mainly formed of fat cells with reticular
fibers
Represent 10-15% in male, 15-25 % in female
of their weight.
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8. White adipose connective tissue
Formed of unilocular fat cells
Most common type
Yellow in colour due to carotene pigments
Site
All over the body except
Eye lid
Penis
Scrotum
Auricle of the ear except its lobule.
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9. Brown adipose connective tissue
Formed of multilocular fat cells
less common type
brown in colour due to its high vascularity and the
cytochromes pigments
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10. Brown adipose connective tissue
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11. Dense connective tissue
Abundant fibers ,
 Few cells,
 Few matrix
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12. Dense irregular connective tissue
It is composed of
Mainly collagen fibers arranged in different directions (irregular).
Few cells
Little matrix
Site:
Perichondrium, periosteum, capsules, dermis, dura mater,
epinureium 12Dr. M. Attia

13. Dense regular connective tissue
Collagen
Elastic
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14. A- Dense regular collagenous CT
Mainly Parallel Arranged Collagen Fibers
Few Cells Mainly Fibroblast
Little Ground Substance
Site
Tendon, ligaments, aponeurosis, fibrous coat of the eye
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15. A- Dense regular Elastic CT
Formed of parallel arranged elastic fibers
Few cells
Little ground substance
Site
•large blood vessles
•Ligament flavum
•Ligament nuchae
•Suspensory ligaments of the penis 15Dr. M. Attia

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