LAB 3 - ANIMAL TISSUES

Question 1

Tissues line body surfaces and cavities, as well as form glands. The cells of the
tissue are closely connected to each other via cellular junctions and because epithelium is found
on the edges of organs, it has two distinct surfaces.

Answer 1

Epithelial tissues

Question 2

Is exposed to the body
cavity or exterior

Answer 2

Apical surface

Question 3

Adjacent to the underlying tissue

Answer 3

Basal surface

Question 4

The epithelium consists of one cell layer

Answer 4

Simple epithelium.

Question 5

Has more than one layer.

Answer 5

Stratified epithelium

Question 6

Generally function in protection, absorption, and secretion

Answer 6

Epithelial tissues

Question 6

Tissues vary widely in their form and function, but they are all characterized by
the presence of extracellular matrix.

Answer 6

Connective tissues

Question 7

Is nonliving material composed
of protein fibers and ground substance.

Answer 7

Extracellular matrix

Question 8

It gives strength in nervous tissue

Answer 8

Collagen

Question 9

It gives flexibility in nervous tissue

Answer 9

Elastin

Question 10

Bones forms in rings around haversian canals around these canals, creating osteon

Answer 10

Lamellae

Question 11

Visible as small dark patches in the labellae

Answer 11

Lacunae

Question 12

Red blood cells that transport oxygen

Answer 12

Erythrocytes

Question 13

White blood cells, protects the body against foreign invaders like bacteria, viruses, etc.

Answer 13

Leukocytes

Question 14

A third type of solid
component you may see on these slides are cellular fragments called ___.

Answer 14

Platelets

Question 15

Specialized for contaction. A third type of solid
component you may see on these slides are cellular fragments called

Answer 15

Muscle tissue

Question 16

• are attached to bones, and contraction of these muscles generates body
  movements
• voluntary
  muscle fibers because we can consciously control their contractions.

Answer 16

Skeletal muscles

Question 17

Is present in the heart, and is categorized as involuntary (not under conscious
control). Cells are striated, but the striations are much less obvious than in skeletal muscle
tissue.

Answer 17

Cardiac muscle

Question 18

communicate with each other via electrical and chemical signals.

Answer 18

Neurons

Question 18

is specialized for communication and composes the brain, spinal cord, and
peripheral nerves. The tissue consists of two major cell types: neurons and glial cells.

Answer 18

Nervous tissue

Question 18

Is found in the walls of hollow organs, such as the gastrointestinal tract,
blood vessels, and the urinary bladder.

Answer 18

Smooth muscle tissue

Question 19

which receive signals

Answer 19

dendrites

Question 20

which sends signals

Answer 20

axons

Question 21

are the support cells of nervous tissue.

Answer 21

Glial cells

Question 22

Mature bone cells that reside in cavities within the matrix called lacunae.

Answer 22

Osteocytes

Question 23

The layer of skin that lies deep to the epidermis

Answer 23

Dermis

Question 24

The cells that reside in small cavities
within the matrix called lacunae.

Answer 24

Chondrocytes

Question 25

Composed of stratified squamous epithelial cells that contain large quantities of the protein keratin.

Answer 25

Epidermis

Question 26

Is a tough fibrous protein that offers protection from abrasion and water loss.

Answer 26

Keratin

Question 27

This tissue is widely distributed throughout the body. It is located underneath
(at the basal surface) of all epithelial tissues, and forms a soft cushioning around organs.

Answer 27

Areolar tissue

Question 27

The walls of lung air sacs (alveoli) are also composed of simple squamous epithelium. Air
sacs are the location of gas exchange between the air and blood.

Answer 27

Lung

Question 28

A tissue consists of adipocytes, or fat storage cells. It functions in energy
storage, insulation, and cushioning.

Answer 28

Adipose tissue

Question 29

Epithelial cells can be one of three shapes:

Answer 29

Squamous (flattened), cuboidal (cube), or columnar.