Section 1

The Human Body Plan

• The human body has four main types of tissue: muscle, nervous, epithelial, and connective.

• A tissue is a collection of cells, an organ is a collection of tissues, and an organ system is a collection of organs.

Vocabulary muscle tissue (p. 907) skeletal muscle (p. 907) smooth muscle (p. 907) cardiac muscle (p. 907)

nervous tissue (p. 907) neurons (p. 907) epithelial tissue (p. 908) connective tissue (p. 908)

• Some of the primary organ systems in the body include the integumentary, nervous, and cardiovascular systems.

• Many organs are located in the body's five main cavities: abdominal, cranial, spinal, thoracic, and pelvic.

matrix (p. 908) organ (p. 909) cranial cavity (p. 910) spinal cavity (p. 910)

diaphragm (p. 910) thoracic cavity (p. 910) abdominal cavity (p. 910) pelvic cavity (p. 910)

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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