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Unformatted text preview: pace maker on right side of atrium-> ssends a signal to pump both sides of atrium. Base is triggered o brain. Regulated by signals from the base of the brain that regulate pumping by levels of CO2 in body. Atrium sends signal to AV node which sends a signal to ventrical o Atrium contracts, ventricle contracts o Rate of heart beat determines amount of blood Blood goes from heart to artery High blood pressure means artery doesnt contract and artery must use pressure to let blood flow through Sphincters close when its cold, sphincters open when its warm (temperature regulation) Control of peripherical Circulation o Hear beat->amount o Sphincter muscles-> where it flows Blood composition o Water 88% o Plasma (liquid) o Ions o Plasma proteins (albium is most common type) o Fibrinogen o Immunoglobins (antibodies-disease fighting) o Nutrients o Waste products of metabolism (mostly nitrogen) o hormones...
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- Fall '11