BPK 142 Lecture : Pulmonay Structure and Function --Fill in the blanks style lecture notes with occasional extras about what was especailly important to remember and some further explanations.

• School: Simon Fraser University
• Department: Biomedical Physio & Kines
• Course: BPK 142
• Professor: Paul Lee

Document Summary

Pulmonary structure and function: anatomy of the respiratory system. Respiratory system consists of nose, __pharynx__, larynx, trachea, _bronchi___, and lungs. Bronchi - primary, secondary, and tertiary bronchi ---> terminal and respiratory bronchioles ---> alveolar ducts ---> alveoli. With branching, supportive __cartilage__ is gradually replaced by _smooth__ muscle. Contraction and relaxation of this __smooth__ muscle constricts or dilates the bronchioles --> major effects on airway __resistance___. The conducting airways lead inspired air to the __alveoli__. Volume of conducting airways = (anatomic dead space (vd) approximately 150 ml for the average adult) Alveoli - small, thin walled sacs that have __capillary__ __beds_ in their walls; site of __gas molecule. [o2 and co2]__ exchange between air and blood; there are millions of alveoli. Respiratory membrane alveolar-capillary membranes that separate the air molecules in the alveoli from the blood in the capillaries. The respiratory membrane has a very __large__ surface area 70 square meters in the normal adult - size of tennis court.