How the Heart Pumps

A medical infographic of a human heart shown in labeled cross-section, filling the center of the frame. Chambers, valves, the aorta and the vena cava are clearly rendered; blue arrows trace deoxygenated blood and red arrows trace oxygenated flow through the four chambers. Thin leader lines connect to a right-hand label column. Clean anatomical-illustration style with soft shading, a crimson and cobalt palette on a warm off-white background. Bold title 'How the Heart Pumps' top-left, a small pulse-line and BPM stat as accents.

一张医学信息图,展示带标注的人体心脏剖面,占据画面中央。心房心室、瓣膜、主动脉与腔静脉清晰呈现;蓝色箭头示意缺氧血,红色箭头示意含氧血在四个腔室间的流向。细引线连向右侧标签列。干净的解剖插画风格,柔和明暗,绯红与钴蓝配色,暖米白背景。左上角粗体标题「心脏如何泵血」,以一条脉搏线与心率数值作点缀。