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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 doesn’t 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
- right atrium, atrium