Lab 6: Tissues: Histology

Question 1

cellularity

Answer 1

the condition of cells and little material between them

Question 2

3 functions of epithelial tissue

Answer 2

-protection from injury, radiation, infection
-control of permability to avoid fluid loss from underlying tissues
-secretion of needed substances by specific clusters of epithelium called glands

Question 3

glandular epithelium

Answer 3

clump-like epithelium tissue that forms glands and secretes various products

Question 4

exocrine glands

Answer 4

secrete products into body cavities and onto surfaces by tubular ducts

Question 5

endocrine glands

Answer 5

secretions diffuse into the bloodstream for their transport throughout the body
-products of endocrine glands are hormones

Question 6

simple epithelium

Answer 6

a single layer of cells
-partial barrier for diffusion, secretion, absorption, and filtration of selected substances

Question 7

stratified epithelium

Answer 7

multiple layered arrangement
-thick barrier for protection

Question 8

simple cubodial epithelium
-what does it look like?

Answer 8

-(from the side) the cells appear square shaped and have a round nucleus in the center

Question 9

simple cubodal epithelium
-where is it located?

Answer 9

-the walls of small tubes that carry fluids, such as kidney tubules and ducts of certain glands, covers the surface of the ovary, and makes up the secreting portion of some endocrine glands

Question 10

simple cuboidal epithelium
-what is its function?

Answer 10

secretion and absorption
-often contains cilia or microvilli

Question 11

simple columnar epithelium
-what does it look like?

Answer 11

a single layer of tall cylindrical cells with an oval shaped nucleus near the basal surface of each cell

Question 12

nonciliated simple columnar epithelium
-where is it?

Answer 12

forms an inner lining of the digestive, reproductive, and urinary tracts
- has microvilli at the apical surface of cells, which aid in secretion and absorption

Question 13

ciliated simple columnar epithelium

Answer 13

lines portions of the respiratory tract, the uterus, the uterine tubes, the paranasal sinuses, the central canal of the spinal cord
-its cilia propels mucus and other substances

Question 14

stratified squamous epithelium

Answer 14

composed of many layers of cells. The superficial cells are squamous (flat), while the cells in the deepest layers are columnar or cuboidal. The layers between the two transition from columnar or cuboidal to squamous.
-the skin. esophogus

Question 15

transitional epithelium
-what does it look like?

Answer 15

Transitional epithelial tissue has been given its name because the cells are usually in the process of changing between a relaxed, plump state and a contracted, flattened state. The change allows the tissue to stretch.

Question 16

transitional epithelium
-where is it found?

Answer 16

-found lining the unrinary bladder and portions of the ureter and urethra, which must stretch to accomidate a temporary increase in urine volume

Question 17

pseudostratified columnar epithelium

Answer 17

-a tissue that appears to have many layers but does not

Question 18

ciliated pseudostratified columnar epithelium
-where is it located?

Answer 18

found lining the trachea and bronchi

Question 19

nonciliated psuedostratified columnar epithelium
-where is it located?

Answer 19

lining large ducts of certain glands, the epididymis, and part of the male urethra
-lacks both cilia and goblet cells

Question 20

mesenchyme

Answer 20

early connective tissue

Question 21

types of connective tissue

Answer 21

blood, bone, cartilage, dense connective tissue, loose connective tissue

Question 22

loose connective tissue
-characterized by?
-what types of tissue?

Answer 22

characterized by the presence of protein fibers that are loosely arranged and in low abundance. Its primary cell type is the fibroblast, which is a large cell capable of movement throughout the semifluid ground substance.

areolar tissue, adipose tissue, reticular tissue

Question 23

dense connective tissue

Answer 23

characterized by a high concentration of collegen fibers, allowing relatively little ground substance and few cells

Question 24

dense regular connective tissue

Answer 24

roughly parallel arrangement of collegen fibers
-forms tendons and ligaments

Question 25

dense irregular connective tissue

Answer 25

has a random arrangement of fibers
-found in the deep layer of the skin (the dermis), in the sclera of the eyes, in the fascia in and around muscles, in capsules surrounding many organs, and in the valves and pericardium of the heart.

Question 26

elastic connective tissue

Answer 26

has a dense arrangement of collegen fibers, but it is dominated by a large number of branching elastic fibers
-found in the walls of large arteries, where it provides a firm but elastic structure.