FISIOLOGI PEMBULUH DARAH PROGRAM STUDI ILMU KEPERAWATAN UNIVERSITAS ESA UNGGUL. PERTEMUAN 4
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
SISTEM PEMBULUH DARAH DAN KARDIOVASKULER Figure 15-1: Functional model of the cardiovascular system
Make Up of Bllod Vessels: Arteries and Arterioles Figure 15-2: Blood vessels
Figure 15-3: Metarterioles Bypass capillaries Large cells Speed flow Figure 15-3: Metarterioles
Blood Pressure: Berasal dari kontrasi ventrikel Figure 15-4: Elastic recoil in the arteries
More Blood Pressures: Pulse and Mean Arterial Pressures Pulse pressure = Systolic–Diastolic Mean arterial pressure (MAP) = Diastolic + 1/3 pulse pressure
More Blood Pressures: Pulse and Mean Arterial Pressures Figure 15-5: Pressure throughout the systemic circulation
Faktor-faktor yang mengatur MAP Volume darah Cardiac output Resistansi Distribusi
Faktor-faktor yang mengatur MAP Figure 15-10: Factors that influence mean arterial pressure
Distribusi Darah pada Organ Tubuh Figure 15-13: Distribution of blood in the body at rest
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
Pertukaran Kapiler: Tekanan Osmotik Koloid yang Konstan Figure 15-18a: Fluid exchange at the capillary
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
Regulasi Tekanan Darah Pusat Kontrol Jantung di Medula Refleks Baroreceptor Carotid Aortic Ginjal: volume darah Hypothalamus & Corteks: stress, “blushing”, dll.
Regulasi Tekanan Darah Figure 15-22: The baroreceptor reflex: the response to increased blood pressure