7.02 Respiratory and Circulatory Systems.rtf - Biology...

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Biology Notebook: 07.02 Respiratory and Circulatory Objectives: Explain how the respiratory and circulatory systems work together Describe the structures and functions of the respiratory system Describe the structures and functions of the circulatory system Differentiate between systolic and diastolic blood pressure Describe the effects of lifestyle on the respiratory and circulatory systems Key Questions and Terms Notes The Respiratory and Circulatory Systems How do the respiratory and circulatory systems work together? To carry oxygen to the body’s cells and remove carbon dioxide from these cells What are the main functions of the respiratory and circulatory systems? To exchange gases with the environment and to transport gases between the respiratory system and the rest of the body Respiratory System What do all cells require a constant supply of? Oxygen Describe the functions and locations of the following parts of the respiratory system: Diaphragm Larynx Lungs and Bronchi Nose Pharynx Trachea Diaphragm : a thing sheet of muscle that forms the bottom, wall of the chest cavity; contracting and relaxing this muscle helps to increase and decrease the volume of the chest cavity, casing you to inhale and exhale. Larynx : found between the pharynx and trachea; consists of 2 highly elastic folds of tissue commonly called the vocal cords; as muscle pulls the tissues together, the air moving between them causes the vocal cords to vibrate and produce sounds, allowing us to speak Lungs and Bronchi : air leaves the trachea and moves into two large tubes called the bronchi; each bronchus leads to one lung, where the tube divides into smaller bronchi that lead to even smaller passages called bronchioles. The bronchi and bronchioles are surrounded by smooth muscles that contract and relax to regulate the size of the air passageways
Nose : the tissues inside your lungs are very delicate, so the main function of the nose is to filter, moisten, and warm air as it enters the respiratory system.

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