Semester Exam: histology connective tissue Flashcards

1
Q

Fibrocartilage description

A

Matrix similar, but less firm than hyaline cartilage
Thick collagen fibers predominate
lacunae smaller, squished, big collagen fibers

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2
Q

Fibrocartilage function

A

Tensile strength and ability to absorb compressive shock

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3
Q

Fibrocartilage location

A

Intervertebral discs
Pubic symphysis
Discs of knee joint (miniscus)

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4
Q

Bone Tissue function

A
Supports and protects organs
Provides levers and attachment site for muscles
Stores calcium and other minerals
Stores fat
Marrow is site for blood cell formation
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5
Q

bone tissue location

A

bones

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6
Q

Blood Tissue description

A

red and white blood cells in a fluid matrix

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7
Q

Blood Tissue function

A

transport of respiratory gases, nutrients, and wastes

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8
Q

Blood Tissue location

A

within blood vessels

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9
Q

Blood Tissue characteristics

A

An atypical connective tissue

Consists of cells surrounded by fluid matrix

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10
Q

Reticular Connective Tissue description

A

network of reticular fibers in loose ground substance

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11
Q

Reticular Connective Tissue function

A

form a soft, internal skeleton (stroma) – supports other cell types

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12
Q

Reticular Connective Tissue location

A

lymph nodes, bone, marrow, spleen

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13
Q

Dense Irregular Connective Tissue description

A

Primarily irregularly arranged collagen fibers

Some elastic fibers and fibroblasts

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14
Q

Dense Irregular Connective Tissue location

A

Dermis of skin
Submucosa of digestive tract
Fibrous capsules of joints and organs

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15
Q

Dense Irregular Connective Tissue function

A
Withstands tension (from multiple directions)
Provides structural strength
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16
Q

Dense Regular Connective Tissue description

A

Primarily parallel collagen fibers (same direction)
Fibroblasts and some elastic fibers
Poorly vascularized (long time to heal)

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17
Q

Dense Regular Connective Tissue function

A

Attaches muscle to bone (tendon)
Attaches bone to bone (ligament)
Withstands great stress in one direction

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18
Q

Dense Regular Connective Tissue location

A

Tendons and ligaments
Aponeuroses (sheet of tendons/dense regular)
Fascia around muscles

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19
Q

elastic connective tissue

A

rare, in aorta, a lot of elastic tissue

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20
Q

Cartilage characteristics

A

Firm, flexible tissue
Contains no blood vessels or nerves
Matrix contains up to 80% water
Cell type – chondrocyte

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21
Q

Cartilage types

A

Hyaline (nose, joints)
Elastic (flexible, ear)
Fibrocartilage (least flexible, discs between vertebra)

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22
Q

Hyaline Cartilage description

A

Imperceptible (cant see) collagen fibers (hyaline = glassy)
Chodroblasts produce matrix
Chondrocytes lie in lacunae

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23
Q

Hyaline Cartilage function

A

Supports and reinforces
Resilient cushion
Resists repetitive stress

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24
Q

Hyaline Cartilage location

A

Ends of long bones
Costal cartilage of ribs
Cartilages of nose, trachea, and larynx Location

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25
Q

Elastic Cartilage description

A

Similar to hyaline cartilage
More elastic fibers in matrix
big lacunae

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27
Q

Elastic Cartilage function

A

Maintains shape of structure

Allows great flexibility

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28
Q

Elastic Cartilage location

A

Supports external ear

Epiglottis

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29
Q

Areolar Connective Tissue description

A

Gel-like matrix with:
all three fiber types (collagen, reticular, elastic) for support
Ground substance is made up by glycoproteins also made and secreted by the fibroblasts.
Cells – fibroblasts, macrophages, mast cells, white blood cells, adipocytes
Highly vascular tissue

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30
Q

areolar connective tissue function

A

Wraps and cushions organs
Holds and conveys tissue fluid
Important role in inflammation
Main battlefield in fight against infection

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30
Q

areolar connective tissue location

A

Widely distributed under epithelia
Packages organs
Surrounds capillaries

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31
Q

Adipose Tissue description

A

Closely packed adipocytes

Have nucleus pushed to one side by fat droplet

32
Q

Adipose tissue function

A

Function
Provides reserve food fuel
Insulates against heat loss
Supports and protects organs

34
Q

Adipose Tissue location

A

Under skin
Around kidneys
Behind eyeballs, within abdomen and in breasts

35
Q

Connective Tissue

A

Most diverse and abundant tissue

36
Q

Main classes of connective tissues

A

Connective tissue proper
Blood – Fluid connective tissue
Cartilage and Bone tissue (both supporting connective tissues)

37
Q

Components of connective tissue:

A

Cells (varies according to tissue)

Matrix (which is made up of Protein fibers and Ground substance )

38
Q

Common embryonic origin

A

mesenchyme

38
Q

connective tissue proper

A

Variety of cells, fibers & grounds substances

Types of cells depend on use

39
Q

Cells found in connective tissue proper

A
Fibroblasts (build collagen)
Macrophages, lymphocytes (antibody producing cells)
Adipocytes (fat cells)
Mast cells (swollen response)
Stem cells (turn into anything)
40
Q

Fibers found in connective tissue proper

A

collagen
elastic
reticular

41
Q

collagen

A

Collagen – very strong & abundant, long & straight

thicker pink

43
Q

elastic

A

Elastic – branching fibers with a wavy appearance (when relaxed)
thin, purple or black (dark colored)

43
Q

reticular

A

Reticular – form a network of fibers that form a supportive framwork in soft organs (i.e. Spleen & liver) mesh, spider web with reticular, and collagen

44
Q

matrix

A

each connective tissue has its own unique matrix, made of fibers and ground substances

46
Q

ground substance

A

Along with fibers, fills the extracellular space

Ground substance helps determine functionality of tissue

48
Q

Connective Tissue Proper - Classifications

A

loose and dense connective tissue

48
Q

loose connective tissue

A

Areolar
Reticular
Adipose
(more cells less fibers, loosely packer)

48
Q

dense connective tissue

A

Regular
Irregular
Elastic
(more fibers, less cells)

49
Q

Covering and Lining Membranes

A

Combine epithelial tissues and connective tissues
Cover broad areas within body
Consist of epithelial sheet plus underlying connective tissue

50
Q

Cutaneous membrane

A

skin

51
Q

Mucous membrane

A

Lines hollow organs that open to surface of body

An epithelial sheet underlain with layer of lamina propria

52
Q

Serous membrane

A

slippery membranes
Simple squamous epithelium lying on areolar connective tissue
Line closed cavities
Pleural, peritoneal, and pericardial cavities

53
Q

Synovial membranes

A
lining joint cavities
Loose connective (areolar) + simple squamous epithelium
Secretes fluid (synovial fluid) which lubricates, protects & cushions joint structures
54
Q

muscle tissue types

A

Skeletal muscle tissue
Cardiac muscle tissue
Smooth muscle tissue

55
Q

Skeletal Muscle Tissue characteristics

A

Long, cylindrical cells
Multinucleate
Obvious striations

56
Q

Skeletal Muscle Tissue function

A

Voluntary movement
Manipulation of environment
Facial expression

57
Q

Skeletal Muscle Tissue location

A

Skeletal muscles attached to bones (occasionally to skin)

58
Q

Cardiac Muscle Tissue function

A

Contracts to propel blood into circulatory system

59
Q

Cardiac Muscle Tissue characteristics

A

Branching cells
Uni-nucleate
Intercalated discs

60
Q

Cardiac Muscle Tissue location

A

Occurs in walls of heart

61
Q

Smooth Muscle Tissue characteristics

A

Spindle-shaped cells with central nuclei
Arranged closely to form sheets
No striations

62
Q

Smooth Muscle Tissue function

A

Propels substances along internal passageways

Involuntary control

63
Q

Smooth Muscle Tissue location

A

Mostly walls of hollow organs

64
Q

Nervous Tissue function

A

Transmit electrical signals from sensory receptors to effectors

65
Q

Nervous Tissue location

A

Brain, spinal cord, and nerves

66
Q

Nervous Tissue description

A

Main components are brain, spinal cord, and nerves
Contains two types of cells
Neurons – excitatory cells
Supporting cells (neuroglial cells)

67
Q

steps in tissue repair

A

inflammation
organization
regeneration and fibrosis

68
Q

inflammation

A

Release of inflammatory chemicals
Dilation of blood vessels
Increase in vessel permeability (white blood cells and clotting proteins leak to area)
Clotting occurs (scab)

69
Q

Organization and restored blood supply

A

begins while inflammation starts
The blood clot is replaced with granulation tissue
Epithelium begins to regenerate
Fibroblasts produce collagen fibers to bridge the gap
Debris is phagocytized

70
Q

Regeneration and fibrosis

A

The scab detaches
Fibrous tissue matures; epithelium thickens and begins to resemble adjacent tissue
Results in a fully regenerated epithelium with underlying scar tissue

71
Q

inflammatory response

A

nonspecific reaction develops quickly where tissue is injured

72
Q

immune response

A

extremely specific but takes longer to act

73
Q

granulation tissue

A

delicate pink tissue composed of capillaries (fragile bleed freely)

74
Q

primary germ layers

A

ectoderm, mesoderm, and endoderm

75
Q

Nerve tissue arises

A

ectoderm

76
Q

Muscle and connective tissues arise from

A

mesoderm

77
Q

Epithelial tissues arise from

A

all three germ layers