Chapter 12: Cardiovascular Physiology System Overview Components of the cardiovascular system: .Heart .Vascular system Blood
Chapter 12: Cardiovascular Physiology Components of the cardiovascular system: •Heart •Vascular system •Blood System Overview
Figure 12-1 Plasma includes water,ions,proteins, nutrients,hormones, Plasma-55% wastes,etc. The hematocrit is a rapid assessment of blood composition. It is the percent of the 8mao254g56 blood volume that is composed of RBCs (red blood cells)
Plasma includes water, ions, proteins, nutrients, hormones, wastes, etc. The hematocrit is a rapid assessment of blood composition. It is the percent of the blood volume that is composed of RBCs (red blood cells). Figure 12-1
Figure 12-2 The heart is the pump that propels the blood through the systemic and pulmonary circuits. Red color indicates blood that is fully oxygenated. Blue color represents blood that is only partially oxygenated
The heart is the pump that propels the blood through the systemic and pulmonary circuits. Red color indicates blood that is fully oxygenated. Blue color represents blood that is only partially oxygenated. Figure 12-2
Figure 12-3 Organ Flow at rest ml/min The distribution of blood Brain 650(13%) in a comfortable,resting person is shown here. Heart 215(4%) Skeletal Dynamic adjustments in 1030(20%) muscle blood delivery allow a person to respond to Skin 430(9%) widely varying circumstances, Kidney 950(20%) including emergencies Abdominal 1200(24%) organs Other 525(10%) Total 5000(100%)
The distribution of blood in a comfortable, resting person is shown here. Dynamic adjustments in blood delivery allow a person to respond to widely varying circumstances, including emergencies. Figure 12-3
negredtorepoduciamordsply TABLE 12-1 The Cardiovascular System COMPONENT FUNCTION Chmbhicboodrom veins to ventridlesAuriaodstventra Ventricles Low-resistance tube blood to the with litte os in pressure.They also act as Arterioles Capillarie particdpateinthereaubionotaneialbltodpPresue and ti Sites of nutrient tabolic end p and fluid exchan between bloc and tissue d flow back to the heart.Their capacity for blood isadjusted to facitate m .gases,and other substances.Its and platelets (cell fragme ocytes that function in immune defenses
Functions of the heart ·Pumping ·Endocrine -Atrial natriuretic peptide(ANP) -Brain natriuretic peptide(BNP) NEP s5egesurgc02aa6
Functions of the heart • Pumping • Endocrine – Atrial natriuretic peptide (ANP) – Brain natriuretic peptide (BNP)
Copyright The McGrw-Hill Companles,Inc.Permission required for reproduction or display Figure 12-6 The Heart The major external and internal parts of the heart are shown in this diagram. Right atriur The black arrows 2 indicate the route Interior vena ca taken by the yocardum blood as it is pumped along
The major external and internal parts of the heart are shown in this diagram. The black arrows indicate the route taken by the blood as it is pumped along. Figure 12-6 The Heart
reproductionor dsplay Valve partly ope AV(icu) Erom B.J.P.Hartey and C.B对 Valves of the heart
Valves of the heart
Copyrlght The M Figure 12-8 onary trunk onary arteries The general route of the blood through the body is shown, ulmonary veins including passage through the heart(colored box). To Body From Body t atrium To Lung To Lur ena cava
The general route of the blood through the body is shown, including passage through the heart (colored box). Figure 12-8
Three major types of cardiac muscle: -Atrial muscle Contractile cells -Ventricular muscle -Specialized excitatory and conductive muscle Autorhythmic cells
• Three major types of cardiac muscle: – Atrial muscle – Ventricular muscle – Specialized excitatory and conductive muscle Contractile cells Autorhythmic cells