Respiratory System. Respiration. Ventilation : Movement of air into and out of lungs External respiration : Gas exchange between air in lungs and blood Transport of oxygen and carbon dioxide in the blood Internal respiration : Gas exchange between the blood and tissues.
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Insert Fig 23.5 all but b
Deb Updegraff, C.N.S., PICU
spectrum which includes visible light, gamma rays and cosmic radiation.
Unlike visible light, radiation passes through stuff.
When you shine a beam of X-Ray at a person
and put a film on the other side of them a shadow is produced of the inside of their body.
PA- the x-rays penetrate through the back of the patient on to the film
AP-the x-rays penetrate through the front of the patient on to the film.
All x-rays in the PICU are portable and are AP view
(the right hemidiaphram is usually slightly higher than
Remember: AP views make heart appear larger than it actually is.
Moves from alveoli into blood. Blood is almost completely saturated with oxygen when it leaves the capillary
P02 in blood decreases because of mixing with deoxygenated blood
Oxygen moves from tissue capillaries into the tissues
Moves from tissues into tissue capillaries
Moves from pulmonary capillaries into the alveoliOxygen and Carbon Dioxide Diffusion Gradients
Respiration can be voluntarily controlled and modified by emotions
Carbon dioxide is major regulator
Increase or decrease in pH can stimulate chemo- sensitive area, causing a greater rate and depth of respiration
Oxygen levels in blood affect respiration when a 50% or greater decrease from normal levels existsModification of Ventilation