02 Connective Tissue

Question 1

Name tissue and arrows

Answer 1

Embryonic Connective Tissue

Left arrows: Mesenchymal cells

Right arrow: Extracellular Matrix

Question 2

Name the tissue and arrow.

Answer 2

Embryonic Connective Tissue

Mesenchymal cells

Question 3

Name the tissue.

Answer 3

Embryonic Connective Tissue

Question 4

Identify the tissue and where it’s found.

Answer 4

Loose (areolar) connective tissue

Found in the mucosa and submucosa of various organs, surrounding blood vessels, nerves and muscles.

Question 5

What part of a blood vessel is made of up loose connective tissue?

Answer 5

Tunica adventitia of blood vessels

Question 6

Identify tissue

Answer 6

Loose connective tissue deep to the epithelium of intestinal villi

Question 7

Identify the tissue and A-E.

Answer 7

Loose (areolar) connective tissue

A: Fibroblasts

B: Collagen Fibers

C: Elastin Fibers

D: Mast cells

E: Ground substance

Question 8

Name the tissue and A-C.

Answer 8

Loose (areolar) connective tissue

Question 9

Identify tissue and where it’s found

Answer 9

Dense regular connective tissue

Found in tendons, ligaments, the cornea and fascia.

Question 10

Answer 10

Question 11

Identify the arrow. Describe Dense Regular Connective Tissue

Answer 11

Consists of regularly oriented parallel bundles of collagen fibers separated by linear rows of fibrocytes.

The nuclei of the fibrocytes appear linear and the cytoplasm is very difficult to see.

Question 12

Identify the arrow.

Answer 12

Tendon

Question 13

Identify the arrow. - type of CT

Answer 13

Ligament

Question 14

Identify.

Answer 14

Cornea

Question 15

Identify.

Answer 15

Fascia

Still Dense Regular CT

Question 16

Identify tissue and where it is found.

Answer 16

Dense irregular CT

Found in the dermis layer of skin and the submucosa of the gastrointestinal tract

Question 17

Identify tissue and its contents A-E.

Answer 17

Dense irregular CT

A: Collagen fibers

B: Blood vessels

C: Fibroblast nuclei

D: Connective tissue cell nuclei

E: Collagen fibers

Contains coarse, thick, intertwined bundles of collagen fibers arranged irregularly.

Fibroblasts are sparse separated by collagen.

Question 18

Identify tissue and location.

Answer 18

Epidermis and Dermis (Dense Irregular CT) of Skin.

Question 19

Answer 19

Reticular CT

Dense Irregular CT

Question 20

Answer 20

Elastic CT

Dense Irregular CT

Question 21

Identify tissue and characteristics.

Answer 21

Reticular CT

Characterized by abundance of reticular fibers

Reticular fibers are produced by fibroblasts (reticular cells)

Reticular fibers are thin, branched structures

Reticular CT is typically found in lymphatic tissue

Question 22

Identify tissue and characteristics.

Answer 22

Elastic CT (upper pic of tunica adventitia of the aorta)

Characterized by abundance of elastic fibers

Elastic fibers of blood vessels are produced by smooth muscle cells

Elastic fibers form discontinuous lamellae around the lumen

Elastic CT is typically found in walls of large blood vessels and ligaments

Question 23

Identify tissue and characteristics

Answer 23

Brown fat

Adipose Tissue

Serves primarily to dissipate energy

Made up of multilocular adipocytes

Multilocular adipocytes are mitochondria rich and have numerous lipid deposits

Question 24

Identify tissue and characteristics.

Answer 24

White Fat

Adipose Tissue

Acts as a reserve of long term energy

Made up of unilocular adipocytes

Unilocular adipocytes have a single large fat (lipid) inclusion that pushes the nucleus to an eccentric position

Question 25

What is an adipocyte?

Answer 25

a modified fibroblast stores lipid, in a single vacuole (unilocular) important for energy storage

Question 26

What is another name fo white fat adipocytes based on their resemblance?

Answer 26

"Signet rings"

Question 27

Fat and skinny people have ___________________ of adipocytes

Answer 27

Fat and skinny people have around the same number of adipocytes. It's how much fat is stored in each that matters. These two images have the same magnification (compare nuclei)

Question 28

Identify tissue.

Answer 28

Some white and brown fat together

Question 29

Identify tissue and location.

Answer 29

Fat in bone marrow

Question 30

What do the wrinkled cell membranes of adipocytes suggest?

Answer 30

Weight loss

Question 31

Identify cellular component in CT

Answer 31

Fibroblasts spindle-shaped cell and oval nucleus Fibroblasts synthesize and secrete proteoglycans, glycoproteins and the precursor molecules of collagen and elastin Fibroblst laying down collagen fibers Fibroblasts also make elastin fibers, ground substance molecules, and more.

Question 32

Identify the cellular component of CT

Answer 32

Collagen three-chain fibrous protein that forms a triple-helix braided coiled coil for tensile strength Two kinds of collagen: fibrillar and non-fibrillar There are 5 "types" of collagen (I-V)

Question 33

Identify cellular component and its characteristics.

Answer 33

Type I Collagen Fibrillar Tissue: Bone, Tendon, Dentin Char: Banded fibers for tensile strength

Question 34

Identify cellular component and its characteristics.

Answer 34

Type II Collagen Fibrillar Tissue: Hyaline and Elastic Cartilage Char: Thinner fibrils

Question 35

Identify cellular component and its characteristics.

Answer 35

Type III Collagen Fibrillar Tissue: Reticular Lamina of basement membranes Char: Reticular fibers

Question 36

Identify cellular component and its characteristics.

Answer 36

Type IV Collagen Non-fibrillar Tissue: Basal lamina Char: Does not form bundles

Question 37

Type V Collagen

Answer 37

Fibrillar Tissue: Fetal amnion and chorion, muscle and tendon sheaths Char: does not form banded fibrils