CHEM-UA 109 Lecture Notes - Lecture 9: As Blood Flows, Respiratory System, Simple Squamous Epithelium
16 Aug 2016
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Can retain 80% of oxygen through countercurrent exchange. As blood flows through gills, all the blood will flow in one direction and out the other(water and blood flowing counter) As blood gets more oxygen, it meets fresher water. By putting blood in opposite direction, efficient with getting oxygen: lungs more oxygen, can be less efficient. Trachea alveoli one way flow. When we breathe in, it goes in and that"s it. Lining of trachea have cilia little hairs move materials out of body. Looks like tree increasing surface area. Alveoli little sacs covered in simple squamous cells. Taking oxygen from alveoli and getting rid of co2. Diaphragm as it contracts, air moves in: hemoglobin. Space in alveoli air coming in red blood cells as they move through capillaries, that oxygen inside of alveoli move in. Iron molecules bonds to oxygen found inside air. Circulatory system: moves o2 around, moves co2 out, open vs. closed system, hemolymph insects and spiders.
