OpenStax
Open Stax: Anatomy and Physiology: Types of Tissues
The term tissue is used to describe a group of cells found together in the body. Although there are many types of cells in the human body, they are organized into four broad categories of tissues: epithelial, connective, muscle, and...
Science Education Resource Center at Carleton College
Serc: Introduction to Human Tissues: How Are Tissues Classified?
In this investigation, young scholars will observe slides of unknown tissues and then draw their observations in a science notebook. They will then work in groups to reach a consensus as to the classification of tissues. This lesson is...
BiologyWise
Biology Wise: Endothelial Cells and Epithelial Cells
Discusses the differences between endothelial and epithelial cells, including where they are found in the human body, their function, and their structure.
BiologyWise
Biology Wise: Structure and Functions of Proteoglycans
Proteoglycans are a type of protein that help in maintaining the integrity of connective tissue. Their chemical structure is quite complex and is explained here with the aid of labeled illustrations. Their functions in the support of...
Exploring Nature
Exploring Nature Educational Resource: 4 Basic Tissue Types in the Human Body
Facts about four basic types of tissues in the human body and their functions.
My Science Site
Bj's Science: Epithelia, Connective Tissue, and Nervous Tissue [Pdf]
Reference sheet providing colorful illustrations of the different cell types that make up tissues.