Biotechnology

The end of the trachea bifurcates (divides) to the right and left lungs. The lungs…

Figure 20.1. Lungs, which appear as nearly transparent tissue surrounding the heart in this X-ray…

For a muscle cell to contract, the sarcomere must shorten. However, thick and thin filaments—the…

Muscle cells are specialized for contraction. Muscles allow for motions such as walking, and they…

Synovial joints are further classified into six different categories on the basis of the shape…

The point at which two or more bones meet is called a joint, or articulation. Joints are…

Long bones continue to lengthen, potentially until adolescence, through the addition of bone tissue at…

Intramembranous ossification Intramembranous ossification is the process of bone development from fibrous membranes. It is involved…

Bones are considered organs because they contain various types of tissue, such as blood, connective…

Figure 19.1.  Improvements in the design of prostheses have allowed for a wider range of…