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FISIOLOGI PEMBULUH DARAH
PROGRAM STUDI ILMU KEPERAWATAN UNIVERSITAS ESA UNGGUL. PERTEMUAN 4
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SISTEM PEMBULUH DARAH DAN KARDIOVASKULER
Arteri: darah dari jantung Kuat & Elastis Mengalirkan darah ke kapiler Kapiler: pertukaran dengan sel Vena Membawa darah kembali ke jantung Katup
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SISTEM PEMBULUH DARAH DAN KARDIOVASKULER
Figure 15-1: Functional model of the cardiovascular system
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Make Up of Bllod Vessels: Arteries and Arterioles
Figure 15-2: Blood vessels
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Figure 15-3: Metarterioles
Bypass capillaries Large cells Speed flow Figure 15-3: Metarterioles
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Blood Pressure: Berasal dari kontrasi ventrikel
Figure 15-4: Elastic recoil in the arteries
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More Blood Pressures: Pulse and Mean Arterial Pressures
Pulse pressure = Systolic–Diastolic Mean arterial pressure (MAP) = Diastolic + 1/3 pulse pressure
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More Blood Pressures: Pulse and Mean Arterial Pressures
Figure 15-5: Pressure throughout the systemic circulation
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Faktor-faktor yang mengatur MAP
Volume darah Cardiac output Resistansi Distribusi
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Faktor-faktor yang mengatur MAP
Figure 15-10: Factors that influence mean arterial pressure
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Distribusi Darah pada Organ Tubuh
Figure 15-13: Distribution of blood in the body at rest
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Pertukaran Kapiler: Tekanan Osmotik Koloid yang Konstan
Protein tetap berada di kapiler Airr, oxygen, glukosa – keluar CO2, sampah nitrogen, air – masuk Aliran keluar dari bagian arteri, masuk pada venous
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Pertukaran Kapiler: Tekanan Osmotik Koloid yang Konstan
Figure 15-18a: Fluid exchange at the capillary
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Net Out Flow Into ECF Net filtration – net absorption = net out flow
About 2 L/day collected by lymph vessels Figure 15-18b: Fluid exchange at the capillary
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Regulasi Tekanan Darah
Pusat Kontrol Jantung di Medula Refleks Baroreceptor Carotid Aortic Ginjal: volume darah Hypothalamus & Corteks: stress, “blushing”, dll.
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Regulasi Tekanan Darah
Figure 15-22: The baroreceptor reflex: the response to increased blood pressure
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