Reticular Fibers in Human Body

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Questions and Answers

Where can mesenchymal cells be found in adults?

in some parts of the uterus and fallopian tube (correct)

in the interscapular and inguinal regions

in the bone marrow

in the liver and spleen

What is the primary component of the organic substance in bones?

Collagen (correct)

Ground Substance

Basal Lamina

Reticular Fibers

What type of collagen is found in bones?

Type 2

Type 4

Type 3

Type 1 (correct)

What is the function of osteoblasts in bone growth?

To form new bone tissue Signup and view all the answers

What is the function of osteoclasts in bone growth?

To dissolve bony tissue Signup and view all the answers

What is the term for growth in circumference of bones?

Appositional growth Signup and view all the answers

What is the term for growth in length of bones?

Interstitial growth Signup and view all the answers

What is the function of ground substance in bones?

To serve as a cement substance Signup and view all the answers

What is the main characteristic of collagen type 1?

Resistance to digestion by trypsin Signup and view all the answers

Which type of collagen is found in the dermis, bone, and tendon?

Type 1 Signup and view all the answers

What is the main function of reticular fibers?

To form delicate networks Signup and view all the answers

Which type of collagen is selectively stained by metallic silver?

Type 3 Signup and view all the answers

What is the diameter of reticular fibers?

0.5 to 2 um Signup and view all the answers

In which tissues are reticular fibers most apparent?

In ordinary histological sections Signup and view all the answers

What is the main component of reticular fibers?

Type 3 collagen Signup and view all the answers

Which type of collagen is found in the basal lamina of epithelial and endothelial cells?

Type 4 Signup and view all the answers

What is the main function of elastic fibers?

To allow for tissue elasticity Signup and view all the answers

Which type of collagen is found in the basal lamina of most epithelia?

Type 4 Signup and view all the answers

What is the composition of the ground matrix?

Principally mucopolysaccharide or glycosaminoglycans Signup and view all the answers

What is the function of reticular fibers?

To form the supporting tissue of lymphoid and blood forming organs Signup and view all the answers

Where are reticular fibers typically found?

In the stroma of glandular organs and in the basal lamina of most epithelia Signup and view all the answers

What is the diameter of elastin fibers?

0.2 to 1.0 um Signup and view all the answers

What type of collagen is associated with reticular fibers?

Type 3 Signup and view all the answers

Which collagen type is the most abundant and has a widespread distribution?

Type 1 Signup and view all the answers

Study Notes

Connective Tissue

Reticular fibers are found in the stroma of many glandular organs, in the basal lamina of most epithelia, and in lymphoid and blood-forming organs.
They consist of type III collagen and have a widespread distribution.
Reticular fibers form a delicate network and can be selectively stained with silver salts.

Collagen Types

Type 1: most abundant, found in dermis, bone, tendon, dentine, fascia, and sclera.
Type 2: found in hyaline and elastic cartilage.
Type 3: found in smooth muscle, endomysium, arterioles, uterus, liver, spleen, kidney, and lungs.
Type 4: found in epithelial and endothelial basal lamina.
Type 5: found in fetal membranes.
Type 6: anchoring fibrils of basal lamina.

Elastic Fibers

Impart a yellowish color to fresh tissue due to the presence of elastin.
Elastic fibers are slender (0.2-1.0 um in diameter) and can be stretched by small forces, returning to their original dimensions when the force is removed.

Undifferentiated Mesenchymal Tissue

Mesenchymal cells are multipotential and can differentiate into other tissue types.
Found in adults in some parts of the uterus, fallopian tube, and along blood vessels.

Bone Growth

Appositional growth: growth in circumference of bones due to osteoblasts forming new bone on the external surface.
Interstitial growth: growth in length of bones due to continued ossification of cartilage at the ends.

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Description

Learn about the presence and distribution of reticular fibers in various human body parts, including glandular organs, epithelia, and lymphoid organs.