BIOL 1080 Lecture 14: lec14mar5
Document Summary
Slide 8b: arterioles, capillaries & venules show the division of labor in tissue, oxygenated blood (red) gives off oxygen & nutrients, and picks up co2 & waste turning into deoxygenated blood (blue) Slide 9a: the capillaries beds show the largest surface area. More blood flow to the brain: diagrams shows resting vs. exercise blood flow (5l/min vs 25l/min) Slide 10a: valves prevent backflow, contraction of skeletal muscles squeeze vein, pushes blood towards heart, breathing causes pressure changes that moves venous blood towards the heart. Slide 10b: what will be covered later on. Slide 11a: cerebral aneurysm can lead to: burst vessel or blood clot, atherosclerosis: starts with pre-teens in canada, deals with low activity, bad diet with low fibre. Slide 11b: excess csf (cerebrospinal fluid) production can occur in elderly (often undetected, high pressure of csf might show a link to neurodegenerative diseases.
