Chapter 2: Cells and Tissues Lesson 2.3 Tissues

Types of Tissues epithelial tissue–lines and covers connective tissue–supports muscle tissue–generates force nerve tissue–conveys information

Epithelial Tissue apical (inside) basal (outside)

Epithelial Cell Shapes squamous flat cuboidal square columnar tall

Epithelial Cell Arrangement simple one layer stratified more than one layer other transitional stretchable

Epithelial Glands secrete substances exocrine endocrine unicellular multicellular simple compound endocrine

Review and Assessment True or False? 1. Connective tissue provides support. 2. Transitional epithelial stretches. 3. Cuboidal cells are flat. 4. Stratified means more than one layer. 5. Epithelial glands secrete substances.

Connective Tissue functions fibers strengthens the body and organs protects internal organs maintains the shape of organs provides rigid framework for muscles to pull fibers collagen reticular elastic

Classes of Connective Tissue connective tissue proper wide variety of locations and functions plays a role in immune defenses cartilage provides support and flexibility minimizes friction bone tissue (osseous tissue) provides framework, protects organs, supports body blood provides transportation, regulation, and protection carries oxygen and nutrients, and carbon dioxide

Types of Connective Tissue connective tissue proper loose dense cartilage bone

Loose Connective Tissue areolar–under epithelium reticular–spleen adipose–fat

Dense Connective Tissue regular dense–tendons irregular dense–dermis dense elastic–large artery walls

Cartilage chondroblasts hyaline elastic fibrocartilage ends of long bones elastic external ear fibrocartilage intervertebral discs

Bone osseous tissue protects organs supports the body

Types of Muscle Tissue skeletal cardiac smooth

Nerve Tissue central nervous system peripheral nervous system glial cells neurons

Review and Assessment Match the following with 1–4 below: skeletal, collagen, nervous tissue, elastic cartilage. 1. muscle tissue type 2. external ear 3. fiber 4. glial cells