Tissues (Tissues)

Copyright © 2006 Pearson Education, Inc., publishing as Benjamin Cummings Body Tissues  Cells are specialized for particular functions  Tissues  Groups of cells with similar structure and function  Four primary types  Epithelium  Connective tissue  Nervous tissue  Muscle

Copyright © 2006 Pearson Education, Inc., publishing as Benjamin Cummings Epithelial Tissues  Found in different areas  Body coverings  Body cavity linings  Glandular tissue  Functions  Protection  Absorption  Filtration  Secretion

Simple Squamous Epithelium

Stratified Squamous Epithelium

Respiratory Epithelium (Pseudostratified Ciliated Columnar Epithelium With Goblet Cells

Copyright © 2006 Pearson Education, Inc., publishing as Benjamin Cummings Connective Tissue  Found everywhere in the body  Includes the most abundant and widely distributed tissues  Functions  Binds body tissues together  Supports the body  Provides protection

Blood

Bone

Hyaline Cartilage Chondrocyte

Copyright © 2006 Pearson Education, Inc., publishing as Benjamin Cummings Muscle Tissue  Function is to produce movement  Three types  Skeletal muscle  Cardiac muscle  Smooth muscle

Cardiac Muscle Intercalated Disc

Cardiac Muscle

Skeletal Muscle

Smooth Muscle

Copyright © 2006 Pearson Education, Inc., publishing as Benjamin Cummings Nervous Tissue  Neurons and nerve support cells  Function is to send impulses to other areas of the body  Irritability  Conductivity Figure 3.21

Neuron (Nervous Tissue)

Stem Cells Stem cells are young undifferentiated cells. Stem cells can mature into a variety of cells with a variety of shapes and functions. For example: A Hemocytoblast is a type of stem cell. It can mature into many different kinds of cells.