Body Tissues

Tissues are groups of cells with similar structure and function

Four primary types of tissues:

1. Epithelium tissue

2. Connective tissue

3. Nervous tissue

4. Muscle tissue

I. Epithelial Tissues

A. 4 Basic Functions

1.Protection

2.Absorption

3.Filtration

4.Secretion

B. Classification of Epithelium

1. Number of cell layers

• Simple – one layer

• Stratified – more than one layer

Figure 3.16a

B. Classification of Epithelium

2. Shape of cells

1. Squamous – flattened

2. Cuboidal – cube-shaped

3. Columnar – column-like

Figure 3.16b

C. Simple Epithelium

1. Simple squamous

Figure 3.17a

C. Simple Epithelium

2. Simple cuboidal

a. Simple Epithelium

3. Simple columnar

Figure 3.17c

a. Simple Epithelium

4. Pseudostratified

Figure 3.17d

D. Stratified Epithelium

1. Stratified squamous

Figure 3.17e

D. Stratified Epithelium

2. Transitional epithelium

Figure 3.17f

E. Glandular Epithelium

• Secretes a particular product

• Two major gland types

Exocrine glands have ducts

Location - Sweat and oil glands

Endocrine glands do not have ducts

Location - Pituitary gland

Connective Tissue

A. Functions

1. Binds body tissues together

2. Supports the body

3. Provides protection

Also Note: Connective tissue has varying amounts of vascularization AND typically contain extracellular matrix

B. Connective Tissue Types

1. Osseous (bone)

Figure 3.18a

B. Connective Tissue Types

2. Hyaline cartilage

Figure 3.18b

B. Connective Tissue Types

3. Fibrocartilage

Figure 3.18c

B. Connective Tissue Types

4. Dense connective tissue

Figure 3.18d

B. Connective Tissue Types

5. Areolar connective tissue

Figure 3.18e

B. Connective Tissue Types

6. Adipose tissue (fat)

Figure 3.18f

B. Connective Tissue Types

7. Reticular connective tissue

Figure 3.18g

B. Connective Tissue Types

8. Blood

Figure 3.18h

III. Muscle Tissue

A. Three types

• Skeletal muscle

• Cardiac muscle

• Smooth muscle

B. Muscle Tissue Types

1. Skeletal muscle

Figure 3.19b

B. Muscle Tissue Types

2. Cardiac muscle

Figure 3.19c

B. Muscle Tissue Types

3. Smooth muscle

Figure 3.19a

IV. Nervous Tissue

• Transmit impulses around the body

Figure 3.20

To Review…

What type of epithelium is this?

What type of epithelium is this?

What type of epithelium is this?

What type of

epithelium is this?

What type of epithelium is this?

What type of connective tissue is this?

What type of connective tissue is this?

What type of connective tissue is this?

What type of connective tissue is this?

What type of tissue is this?

What type of muscle?

What muscle type?