What are the major organ systems of the human body - can look
Tissue engineering is a biomedical engineering discipline that uses a combination of cells , engineering , materials methods, and suitable biochemical and physicochemical factors to restore, maintain, improve, or replace different types of biological tissues. Tissue engineering often involves the use of cells placed on tissue scaffolds in the formation of new viable tissue for a medical purpose but is not limited to applications involving cells and tissue scaffolds. While it was once categorized as a sub-field of biomaterials , having grown in scope and importance it can be considered as a field in its own. While most definitions of tissue engineering cover a broad range of applications, in practice the term is closely associated with applications that repair or replace portions of or whole tissues i. Often, the tissues involved require certain mechanical and structural properties for proper functioning. The term has also been applied to efforts to perform specific biochemical functions using cells within an artificially-created support system e. The term regenerative medicine is often used synonymously with tissue engineering, although those involved in regenerative medicine place more emphasis on the use of stem cells or progenitor cells to produce tissues. what are the major organ systems of the human body
What are the major organ systems of the human body Video
Human Body 101 - National GeographicThere are 11 major organ systems in the human body.
For this article, there is an overview for five of these organ systems. Each contains at least one vital organ and other structures that are important for healthy body function. The nervous system is the main command system that directs function for all other systems. However, without proper functioning of the cardiovascular system and respiratory system, the nervous system shuts down within a short period of time. The nervous system sends signals throughout the body to control function and movement. It is composed of the brain, spinal cord and peripheral nervous system. It directs quick responses to stimuli, such as automatic reflexes.
Nervous System
The nervous system works in conjunction with the endocrine system to control metabolism and other body functions. While the nervous system relies mostly on electrical signals for messaging, the endocrine system uses chemical messengers. It secretes hormones into blood and other body fluids. Water balance, body growth and responses to stress are some of the activities regulated by the endocrine system. Glands that secrete hormones include the pituitary, thyroid, adrenal, pancreas and hypothalamus.
The cardiovascular system is occasionally referred to as the circulatory system. It contains the heart, blood vessels and blood.
Organ systems in the human body
The blood transports nutrients, hormones, gases and waste products by using the blood vessels. The heart pumps the blood throughout the body and maintains blood pressure. Arteries pump blood away from the heart, and veins return blood toward the heart. The respiratory system contains the nasal cavities, throat areas and lungs.
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The pharynx is shared with the digestive tract. Air moves from the pharynx to the larynx, which protects the opening to the trachea.
Endocrine System
The trachea is the main passageway to the lungs. It acts as an air filter. Inside the lungs, oxygen is extracted from the air, and carbon dioxide is exhaled as a waste product. In the digestive system, food is absorbed and processed by the body.]
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