Health Consequences of Loss of Cell Division Control

Control of cell division is absolutely crucial to health. With too infrequent mitoses, an embryo could not develop, a child could not grow, and wounds would not heal. Too frequent mitoses produce an abnormal growth, or neoplasm, which may form a disorganized mass called a tumor.

Tumors are of two types. A benign tumor remains in place like a lump, eventually interfering with the

Shier-Butler-Lewis: I I. Levels of Organization I 3. Cells I I © The McGraw-Hill

Human Anatomy and Companies, 2001

Physiology, Ninth Edition

Sperm

Cells dividing by mitosis and cytokinesis

Sperm

Cells dividing by mitosis and cytokinesis

Red blood cell y

Connective tissue cell

Essentials of Human Physiology

Essentials of Human Physiology

This ebook provides an introductory explanation of the workings of the human body, with an effort to draw connections between the body systems and explain their interdependencies. A framework for the book is homeostasis and how the body maintains balance within each system. This is intended as a first introduction to physiology for a college-level course.

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