April 5th Tissues cont.
 Return Papers
 Quiz 3
 Review Epithelial Tissue
 Notes: Glandular Epithelia
 Tutorial and Notes: Connective Tissue
 Lab 13: continue…up to # 14
 Break
1
Final Exam
 Chapter 4: Human Tissues
 Tissue Identification (from ppt. slides)
 Type of Tissue,
 Where Found in the Body
 Genetics/Diseases Lecture
2
EPITHELIAL TISSUE
QUESTIONS
3
Review Questions
1 What is the purpose for fixing tissues for
microscope viewing?
2 Epithelial tissue has polarity (an apical and basal
surface). Why is this important ?
3 Which of these properties apply to epithelial
tissue? Has blood vessels, can repair itself, cells
joined by lateral contacts ?
4
Review Questions
4 Stratified epithelia are built for protection and to
resist abrasion. What are the simple epithelia
better at ?
5 What is meant by “pseudostratified” epiphelia ?
6 Where is transitional epithelium found and why is
it important at those sites ?
5
Where in the body would you find:
7 Simple cuboidal epithelia
8 Simple squamous epithelia
9 Simple columnar epithelia
10 Stratified squamous epithelia
11 Stratified cuboidal
12 Transitional epithelia
6
Label the following Epithelial Tissue Types
7
Review!!
E
Can You Identify the
Classes of Epithelium?
D
A
B
C
Tissue: The Living Fabric PART 2
Glandular
Epithelia
Glandular Epithelium
 Define Gland
 Differentiate between exocrine and endocrine glands
 Differentiate between multicellular and unicellular
glands
 Describe how multicellular and exocrine glands are
classified structurally and functionally
11
Epithelia: Glandular
 A gland is one or more cells that makes and secretes
an aqueous fluid
 Classified by:
 Site of product release – endocrine or exocrine
 Relative number of cells forming the gland –
unicellular or multicellular
12
Endocrine Glands
 Ductless glands that produce hormones
 Secretions include amino acids, proteins,
glycoproteins, and steroids
13
Exocrine Glands
 More numerous than endocrine glands
 Secrete their products onto body surfaces (skin) or
into body cavities
 Examples include mucous, sweat, oil, and salivary
glands and the pancreas and liver
 The only important unicellular glands are the
mucous cells and goblet cells
 Multicellular exocrine glands are composed of a
duct and secretory unit
14
Multicellular Exocrine Glands
 Basic Parts:
 Epithelial derived duct
 Secretory unit (acinus): secretory cells surrounded
by connective tissue
15
Classification: Multicellular Exocrine Glands
 Simple or compound duct type
 Structure of their secretory units
 Tubular (secretory cells form tubes)
 Alvelolar (secretory cells form small flasklike
sacs)
 Tubuloaveolar (contain both tubular and
alvelolar units)
16
Structural Classification of Multicellular
Exocrine Glands
17 4.3a-d
Figure
Structural Classification of Multicellular
Exocrine Glands
18 4.3e-g
Figure
Classification by Modes of Secretion
 Merocrine – products are secreted by exocytosis
(e.g., pancreas, sweat, and salivary glands)
 Holocrine – products are secreted by the rupture of
gland cells (e.g., sebaceous glands)
19
Modes of Secretion
20
Figure 4.4
Check Your Understanding
1 What common secretion is produced by all
unicellular exocrine glands
2 How are multicellular exocrine glands classified ?
3 Which of the gland types would be expected to
have the highest rate of cell division? Why?
21
Lab 13: Human Tissue
 Continue Lab 13
 Sketch at 100X and 400X
 Label Structures
 Color
 Answer Questions
22