Connective Tissue

Question 1

Connective Tissue

Answer 1

Throughout body but never exposed to outside
Many have blood vessels and sensory receptors
1. Specialized cells
2. Extracellular protein fibers
3. Fluid (ground substance)
Fewer cells and more extracellular material

Question 2

Fibroblast

Answer 2

Responsible for synthesis of collagen, elastic and reticular fibers

Question 3

Collagenous fibers

Answer 3

Like rope
Most abundant- 25%
Tough, flexible, and stretch resistant
Tendons, ligaments, and deep layer of skin

Question 4

Reticular fibers

Answer 4

Thin collagen fibers coated with glycoprotein
Form framework of spleen and lymph nodes

Question 5

Elastic fibers

Answer 5

Skin, arteries
Thinner collagenous fibers, made of protein elastin
Allows stretch and recoil

Question 6

Loose connective tissue

Answer 6

Much gel-like ground substance between cells
Areolar, Reticular, Adipose

Question 7

Dense connective tissue

Answer 7

Fibers fill spaces between cells
Dense regular and dense irregular

Question 8

Areolar tissue

Answer 8

Loosely organized fibers, abundant blood vessels, empty space
Runs in random directions; mostly collagenous, but elastic and reticular
Almost every part of the body
Cushions organs; provides support but permits independent movement
Underlies epithelia, in serous membranes, between muscles

Question 9

Adipose tissue

Answer 9

Adipocytes are dominant cell type
Primary energy reservoir
Provides reserve food fuel; insulates; supports and protects organs
Under skin; around kidneys and eyeballs; within abdomen; in breasts

Question 10

Reticular tissue

Answer 10

Fibers form soft internal skeleton that supports other cell types including white blood cells, mast cells, and macrophages
Lymphoid organs(lymph nodes, bone marrow, and spleen)

Question 11

Dense regular tissue

Answer 11

Attaches muscles to bones or to muscles; bones to bones; resists great stress
Tendons, most ligaments

Question 12

Dense irregular tissue

Answer 12

Able to withstand tension exerted from many directions
Dermis of skin; digestive tract; fibrous capsules of organs and joints

Question 13

Cartilage

Answer 13

Stiff connective tissue with flexible matrix
Avascular
Hyaline cartilage, fibrocartilage, elastic cartilage

Question 14

Hyaline cartilage

Answer 14

Supports and reinforces; has resilient cushioning properties; resists compressive stress
Forms most of embryonic skeleton, covers ends of long bones in joint cavities; forms costal cartilages of ribs
Nose, trachea and larynx

Question 15

Elastic cartilage

Answer 15

Maintains shape of structure while allowing great flexibility
Supports external ear; epiglottis

Question 16

Fibrocartilage

Answer 16

Tensile strength with ability to absorb compressive shock
Intervertebral discs; discs of knee joint

Question 17

Bone tissue

Answer 17

Calcified connective tissue
Spongy bone: porous appearance
Compact bone: denser, calcified with no visible spaces

Question 18

Haversian systems