Tissues• Distinguish the four tissue types.

- epithelial, connective, nervous and muscle

Case: Neonatal Jaundice

•Draw an epithelium, labeling cell junctions and the apical & basal membranes.

•Explain the role of different epithelial types and different junction types.

Epithelial tissue objectives

Epithelia - cover body surfaces and line body cavities (lumen), form glands

Functions of epithelial cells include: * movement of materials in and out of the body. * protection of the internal environment against the external.* secretion of a product.

Characteristics of epithelial cells:

1. They are contiguous (attached to one another).

2. The cells rest on the basement membrane, an extracellular matrix they produce.

3. They often have two different sides - apical side : towards the lumen - basal side : towards extracellular fluid* Note these cells are polarized, meaning the two cell surfaces

have different functions.

Types of epithelial tissues:

- exchange - transporting- protective- ciliated- secretory

exocrine- mucus, saliva, earwax, milk, oil, digestive enzymes

endocrine- hormones

1.&2. Smooth muscle 3. Transporting

epithelium

4. Secretory epithelium (goblet cell)

5. Lumen

Digestive tract - example organ with multiple tissues

Connective tissue objectives

– List the basic components of connective tissue and their contribution to tissue function.

– Name and describe the different connective tissue types.

Composed of…

specialized cells and their extracellular products

Connective tissue type depends on…1. type of cell specialization2. type and arrangement of protein fibers3. type of ground substance

Connective tissues support, connect, protect, strengthen and insulate other tissues.

collagen - gives strength

elastin - gives flexibility

Two fiber types in connective tissue

Loose connective tissue

Dense regular connective tissue

Cartilage Adipose (fat)

BloodBone

For Monday…

• Review epithelial and connective tissue• Begin Chapter 5 - cell membrane components

and movement across membranes