Professor Jill McMillin
G150/PHA1500 Section 08 Structure and Function of the Human Body
May 30, 2010
The Cardiovascular and Muscular Systems
Organ system is a group of organs that work together to perform a certain task. Humans have a variety of systems due to the complexity of the species' organism. The human body consists of biological systems, that consist of organs, that consist of tissues, that consist of cells and connective tissue. Although an organ has a specific function, organs also function as part of a group. The organ system is the organizational unit by which medicine is studied, diseases are generally categorized, and treatments are planned. Homeostasis is self-regulation of a biological system in balance. The Cardiovascular homeostasis is the process by which the functioning of the cardiovascular system is maintained at a level of functional efficiency appropriate to the conditions that each behavior requires. The system consists of the heart and blood vessels and their main task is to ensure optimal blood flow in different organs. Accomplishes this task using a fixed volume of blood, about 6-8% of body weight. That is, a 70 kg body weight is between 5.0 and 5.5 l of blood. Muscular homeostasis is capable of maintaining a normal body temperature somewhere between 37° C and 38° C even if the external temperature varies between 16° C and 54° C.
When the body is at rest, body heat is generated primarily by the liver, heart, brain, and endocrine glands but when the muscles are active they generate many times the heat produced by these organs.
The cardiovascular system includes the heart and the blood vessels. The heart pumps blood, and the blood vessels channel and deliver it throughout the body. Arteries carry blood filled with nutrients away from the heart to all parts of the body. The blood is sometimes compared to a river, but the arteries are more like a river in reverse. Arteries are
Bibliography: www.wikipedia.org www.google.com www.answer.com www.wiki.answers.com www.monografias.com www.biology.about.com www.innerbody.com www.librarythinkquest.org Human Anatomy & Physiology Textbook