Lab 19 - Histology

Question 1

define histology

Answer 1

the study of tissues

Question 2

what are the various purposes of tissues?

Answer 2

to cover or line, enable movement, or regulate body functions

Question 3

what are tissues?

Answer 3

composed of one or more cell types that provide a common function

Question 4

what are the 4 main tissue types?

Answer 4

epithelial connective muscular nervous

Question 5

what is epithelial tissue?

Answer 5

tissues that form a layer of cells to line a body cavity or surface

Question 6

what is connective tissue?

Answer 6

• usually composed of cells/fibers in a grounded substance - to join or insulate various body parts -support/protect body cavity -serve as means to transport substances

Question 7

what is supportive connective tissue?

Answer 7

-a subtype of connective tissue -includes cartilage and bone

Question 8

what is cartilage? give examples

Answer 8

a resilient tissue that provides flexible support and gives shape to structures like the ear, nose, and trachea

Question 9

what is muscular tissue? (name the 3 types)

Answer 9

-associated with movement -smooth muscle (involuntary) -cardiac (involuntary) -skeletal (voluntary)

Question 10

Answer 10

simple squamous epithelium

–thin and platelike

• ound in excratory ducts of many glands
• parts of kidney and testes
• lining of blood vessels

Question 11

Answer 11

stratified squamous epithelium

-epidermis, mouth, esophagous, vagina, cornea, portion of urethra

Question 12

Answer 12

cuboidal epithelium

• square or rectangular
• found in many glands
• free surface of ovary
• lining of kidney tubules

Question 13

Answer 13

columnar epithelium

• tall and slender
• “columns”
• line surface of small/large intesine
• bronchi of lungs and uterus/oviducts

Question 14

Answer 14

loose (areolar) connective tissue

• composed of cells, intercellular fibers, and ground substance
• forms superficial and deep fascia (tissue covering organs)
• structural support to blood vessels/nerves

Question 15

Answer 15

dense (regular) connective tissue

• structural strength
• attached to bones, ligaments, palm of hand

Question 16

Answer 16

adipose tissue

• fat cells
• nuclei are pushed to the side

Question 17

Answer 17

blood cells

• lymphocytes/leukocytes (white blood cells)
• erythrocytes (red blood cells)
• platelets

Question 18

Answer 18

hyaline cartilage

• lacunae (hole)
• chondrocytes (form spongy cartilage)
• found on end of ribs, tracheal rings, larynx, joint surfaces of bones

Question 19

Answer 19

bone (compact)

• osteon or “haversian system” (5-20 lamellae)
• canaliculi (spindle fibers)
• osteocytes (bone forming cells) live inside lacunae holes

lamellae (circle pattern)

Question 20

Answer 20

skeletal muscle

• voluntary
• nuclei (black dots)
• striations (thick red strips)

Question 21

Answer 21

cardiac muscle

-involuntary

Question 22

Answer 22

smooth muscle

• involuntary
• contractile portion of digestive tract walls
• found in respiratory passages
• in urinary and genital ducts

Question 23

Answer 23

neuron (nerve cell)

-glial cells (smaller cells surrounding neuron)

Question 24

Answer 24

tendon

• type of dense connective tissue
• made of collagen fibers/fibroblasts