BIOL 4160 Lecture : BIO 4160 Final Notes
Document Summary
Respiration: general function is to obtain o2 for use by the body"s cells and to eliminate the co2 the body cells produce, encompasses 2 separate but related processes internal respiration, external respiration. Respiratory system: consists of, respiratory airways leading into the lungs, structures of the thorax involved in producing movement of air lungs through the airways into and out of the lungs. Respiratory airways: tubes that carry air between the atmosphere and the air sacs, nasal passages (nose, pharynx (common passageway for respiratory and digestive systems, trachea (windpipe, larynx (voicebox) 2: right and left bronchi, bronchioles, alveoli (air sacs) are clustered at ends of terminal bronchioles. Respiratory airways: trachea and larger bronchi fairly rigid, non-muscular tubes, rings of cartilage prevent collapse, bronchioles, no cartilage to hold them open, walls contain smooth muscle innervated by autonomic nervous system, sensitive to certain hormones and local chemicals. Alveoli: thin-walled inflatable sacs function in gas exchange, pulmonary capillaries encircle each alveolus.
