<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta name="aspect-ratio" content="4:3">
  <style>
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    body {
      font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
      background: #ffffff;
      color: #1e2945;
      padding: 12px;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    /* Concept Banner */
    .summary-banner {
      background: #f0f7ff;
      border: 1px solid #bae0ff;
      border-radius: 8px;
      padding: 8px 12px;
      text-align: center;
      font-weight: 700;
      font-size: 15px;
      color: #0050b3;
    }

    /* Comparison Grid */
    .compare-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 10px;
      width: 100%;
    }

    @media (max-width: 400px) {
      .compare-grid {
        grid-template-columns: 1fr 1fr;
        gap: 6px;
      }
    }

    .state-card {
      background: #f8fafc;
      border: 2px solid #e2e8f0;
      border-radius: 12px;
      padding: 10px 8px;
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 8px;
      text-align: center;
      transition: border-color 0.2s, box-shadow 0.2s;
    }

    .state-card.active-state {
      background: #fff7f7;
      border-color: #fca5a5;
    }

    .state-title {
      font-size: 15px;
      font-weight: 700;
      display: flex;
      align-items: center;
      gap: 4px;
    }

    .avatar {
      font-size: 32px;
      line-height: 1;
    }

    /* Stat Indicators */
    .metric-box {
      width: 100%;
      background: #ffffff;
      border: 1px solid #e2e8f0;
      border-radius: 8px;
      padding: 6px 4px;
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 2px;
    }

    .active-state .metric-box {
      border-color: #fed7d7;
    }

    .metric-value {
      font-size: 15px;
      font-weight: 800;
      color: #1e2945;
    }

    .active-state .metric-value.heart-val {
      color: #dc2626;
    }

    .active-state .metric-value.lung-val {
      color: #2563eb;
    }

    .metric-label {
      font-size: 12px;
      font-weight: 600;
      color: #64748b;
    }

    /* Animated Icons */
    .icon-wrap {
      height: 32px;
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .heart-svg {
      width: 26px;
      height: 26px;
      fill: #ef4444;
      transform-origin: center;
    }

    .lungs-svg {
      width: 26px;
      height: 26px;
      fill: #3b82f6;
      transform-origin: center;
    }

    /* Rest animations (75 BPM = 0.8s, 16 BrPM = 3.75s) */
    .pulse-rest {
      animation: heartPulse 0.8s infinite ease-in-out;
    }

    .breathe-rest {
      animation: lungBreathe 3.75s infinite ease-in-out;
    }

    /* Active animations (145 BPM = 0.414s, 36 BrPM = 1.67s) */
    .pulse-active {
      animation: heartPulse 0.414s infinite ease-in-out;
      filter: drop-shadow(0 0 4px rgba(239, 68, 68, 0.6));
    }

    .breathe-active {
      animation: lungBreathe 1.67s infinite ease-in-out;
      filter: drop-shadow(0 0 4px rgba(59, 130, 246, 0.5));
    }

    @keyframes heartPulse {
      0%, 100% { transform: scale(1); }
      20% { transform: scale(1.22); }
      40% { transform: scale(1.05); }
      55% { transform: scale(1.18); }
    }

    @keyframes lungBreathe {
      0%, 100% { transform: scale(0.9); opacity: 0.75; }
      50% { transform: scale(1.25); opacity: 1; }
    }

    /* Interactive sound control */
    .sound-btn {
      align-self: center;
      background: #f1f5f9;
      border: 1px solid #cbd5e1;
      border-radius: 20px;
      padding: 6px 14px;
      font-size: 13px;
      font-weight: 600;
      color: #475569;
      cursor: pointer;
      display: inline-flex;
      align-items: center;
      gap: 6px;
      user-select: none;
    }

    .sound-btn:active {
      background: #e2e8f0;
    }
  </style>
</head>
<body>

  <div class="summary-banner">
    More Muscle Work = More Oxygen Needed
  </div>

  <div class="compare-grid">
    
    <div class="state-card">
      <div class="state-title">Resting</div>
      <div class="avatar">🪑</div>

      <div class="metric-box">
        <div class="icon-wrap">
          <svg class="heart-svg pulse-rest" viewBox="0 0 24 24">
            <path d="M12 21.35l-1.45-1.32C5.4 15.36 2 12.28 2 8.5 2 5.42 4.42 3 7.5 3c1.74 0 3.41.81 4.5 2.09C13.09 3.81 14.76 3 16.5 3 19.58 3 22 5.42 22 8.5c0 3.78-3.4 6.86-8.55 11.54L12 21.35z"/>
          </svg>
        </div>
        <div class="metric-value">75 BPM</div>
        <div class="metric-label">Heart Rate</div>
      </div>

      <div class="metric-box">
        <div class="icon-wrap">
          <svg class="lungs-svg breathe-rest" viewBox="0 0 24 24">
            <path d="M7 3c-.55 0-1 .45-1 1v6.5C6 13 4 15 4 18c0 2.21 1.79 4 4 4 1.86 0 3.41-1.28 3.86-3H12v-5h-1V4c0-.55-.45-1-1-1H7zm10 0c-.55 0-1 .45-1 1v10h-1v5h.14c.45 1.72 2 3 3.86 3 2.21 0 4-1.79 4-4 0-3-2-5-2-7.5V4c0-.55-.45-1-1-1h-3z"/>
          </svg>
        </div>
        <div class="metric-value">16 /min</div>
        <div class="metric-label">Breathing</div>
      </div>
    </div>

    
    <div class="state-card active-state">
      <div class="state-title">Active</div>
      <div class="avatar">🏃</div>

      <div class="metric-box">
        <div class="icon-wrap">
          <svg class="heart-svg pulse-active" viewBox="0 0 24 24">
            <path d="M12 21.35l-1.45-1.32C5.4 15.36 2 12.28 2 8.5 2 5.42 4.42 3 7.5 3c1.74 0 3.41.81 4.5 2.09C13.09 3.81 14.76 3 16.5 3 19.58 3 22 5.42 22 8.5c0 3.78-3.4 6.86-8.55 11.54L12 21.35z"/>
          </svg>
        </div>
        <div class="metric-value heart-val">145 BPM</div>
        <div class="metric-label">Heart Rate</div>
      </div>

      <div class="metric-box">
        <div class="icon-wrap">
          <svg class="lungs-svg breathe-active" viewBox="0 0 24 24">
            <path d="M7 3c-.55 0-1 .45-1 1v6.5C6 13 4 15 4 18c0 2.21 1.79 4 4 4 1.86 0 3.41-1.28 3.86-3H12v-5h-1V4c0-.55-.45-1-1-1H7zm10 0c-.55 0-1 .45-1 1v10h-1v5h.14c.45 1.72 2 3 3.86 3 2.21 0 4-1.79 4-4 0-3-2-5-2-7.5V4c0-.55-.45-1-1-1h-3z"/>
          </svg>
        </div>
        <div class="metric-value lung-val">36 /min</div>
        <div class="metric-label">Breathing</div>
      </div>
    </div>
  </div>

  <button class="sound-btn" id="soundBtn" onclick="toggleAudioPulse()">
    <span>🔊</span> Compare Heartbeats
  </button>

  <script>
    let audioCtx = null;
    let isPlaying = false;
    let beatTimer = null;

    function playTone(freq, duration) {
      if (!audioCtx) audioCtx = new (window.AudioContext || window.webkitAudioContext)();
      const osc = audioCtx.createOscillator();
      const gain = audioCtx.createGain();
      osc.type = 'sine';
      osc.frequency.setValueAtTime(freq, audioCtx.currentTime);
      gain.gain.setValueAtTime(0.2, audioCtx.currentTime);
      gain.gain.exponentialRampToValueAtTime(0.001, audioCtx.currentTime + duration);
      osc.connect(gain);
      gain.connect(audioCtx.destination);
      osc.start();
      osc.stop(audioCtx.currentTime + duration);
    }

    function toggleAudioPulse() {
      const btn = document.getElementById('soundBtn');
      if (isPlaying) {
        clearInterval(beatTimer);
        isPlaying = false;
        btn.innerHTML = '<span>🔊</span> Compare Heartbeats';
        return;
      }

      isPlaying = true;
      btn.innerHTML = '<span>⏸</span> Stop Sound';

      let count = 0;
      beatTimer = setInterval(() => {
        // Switch between 4 resting beats and 8 active beats to teach audio difference
        if (count % 12 < 4) {
          playTone(130, 0.1);
        } else {
          playTone(180, 0.08);
        }
        count++;
      }, 414);
    }
  </script>
</body>
</html>

How Physical Exercise Affects Heart Rate and Breathing

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta name="aspect-ratio" content="1:1">
  <title>Oxygen & Blood Delivery Loop</title>
  <script src="{{VENDOR_CDN}}/classace-diagram.js"></script>
  <style>
    * { box-sizing: border-box; margin: 0; padding: 0; }
    body {
      font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
      color: #1e2945;
      background: #ffffff;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: space-between;
      width: 100%;
      min-height: 100%;
      padding: 12px;
      user-select: none;
    }

    .header {
      text-align: center;
      margin-bottom: 4px;
    }
    .title {
      font-size: 15px;
      font-weight: 700;
      color: #1e2945;
    }

    /* Diagram Stage */
    .stage {
      position: relative;
      width: 100%;
      max-width: 340px;
      height: 250px;
    }

    svg {
      width: 100%;
      height: 100%;
      overflow: visible;
    }

    /* Organ Nodes */
    .node-card {
      transition: transform 0.3s ease, filter 0.3s ease, opacity 0.3s ease;
      cursor: pointer;
    }
    .node-card rect {
      fill: #ffffff;
      stroke: #e2e8f0;
      stroke-width: 2;
      rx: 16;
      transition: stroke 0.3s ease, stroke-width 0.3s ease;
    }
    .node-title {
      font-size: 11px;
      font-weight: 700;
      fill: #1e2945;
    }
    .node-icon {
      font-size: 20px;
      text-anchor: middle;
      dominant-baseline: central;
    }

    /* Active Highlight States */
    .active-1 #node-lungs rect { stroke: #0284c7; stroke-width: 3; }
    .active-2 #node-heart rect { stroke: #ef4444; stroke-width: 3; }
    .active-3 #node-muscle rect { stroke: #10b981; stroke-width: 3; }
    .active-4 #node-lungs rect { stroke: #64748b; stroke-width: 3; }

    /* Pulsing heart beat */
    @keyframes heartBeat {
      0%, 100% { transform: scale(1); }
      50% { transform: scale(1.12); }
    }
    .active-2 #heart-icon {
      transform-origin: 170px 125px;
      animation: heartBeat 0.8s infinite ease-in-out;
    }

    /* Arrow Paths */
    .flow-path {
      fill: none;
      stroke-width: 3.5;
      stroke-linecap: round;
      transition: opacity 0.3s ease, stroke-width 0.3s ease;
    }
    .path-in { stroke: #0284c7; }
    .path-artery { stroke: #ef4444; }
    .path-vein { stroke: #64748b; }
    .path-out { stroke: #94a3b8; stroke-dasharray: 4 3; }

    /* Animated Blood Flow Dash */
    .flow-dash {
      stroke-dasharray: 6 6;
      animation: dashFlow 1.5s linear infinite;
    }
    @keyframes dashFlow {
      to { stroke-dashoffset: -24; }
    }

    /* Step Banner Callout */
    .callout-box {
      width: 100%;
      max-width: 340px;
      background: #f8fafc;
      border: 1.5px solid #e2e8f0;
      border-radius: 12px;
      padding: 8px 12px;
      display: flex;
      align-items: center;
      gap: 8px;
      min-height: 44px;
    }
    .badge {
      font-size: 11px;
      font-weight: 800;
      padding: 3px 8px;
      border-radius: 6px;
      color: #fff;
      white-space: nowrap;
    }
    .badge-1 { background: #0284c7; }
    .badge-2 { background: #ef4444; }
    .badge-3 { background: #10b981; }
    .badge-4 { background: #64748b; }

    .callout-text {
      font-size: 13px;
      font-weight: 600;
      color: #1e2945;
      line-height: 1.2;
    }

    /* Controls */
    .controls {
      display: flex;
      align-items: center;
      gap: 6px;
      width: 100%;
      max-width: 340px;
      margin-top: 6px;
    }
    .step-btn {
      flex: 1;
      height: 32px;
      border: 1.5px solid #e2e8f0;
      background: #ffffff;
      border-radius: 8px;
      font-size: 12px;
      font-weight: 700;
      color: #64748b;
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: center;
      transition: all 0.2s ease;
    }
    .step-btn.active {
      background: #1e2945;
      color: #ffffff;
      border-color: #1e2945;
    }
    .play-btn {
      width: 36px;
      height: 32px;
      border: 1.5px solid #e2e8f0;
      background: #ffffff;
      border-radius: 8px;
      font-size: 13px;
      color: #1e2945;
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: center;
    }
  </style>
</head>
<body>

  <div class="header">
    <div class="title">Oxygen Delivery Loop</div>
  </div>

  <div class="stage" id="stage">
    <svg viewBox="0 0 340 250">
      <defs>
        
        <marker id="arrow-blue" viewBox="0 0 10 10" refX="6" refY="5" markerWidth="6" markerHeight="6" orient="auto-start-reverse">
          <path d="M 0 1 L 8 5 L 0 9 z" fill="#0284c7" />
        </marker>
        <marker id="arrow-red" viewBox="0 0 10 10" refX="6" refY="5" markerWidth="6" markerHeight="6" orient="auto-start-reverse">
          <path d="M 0 1 L 8 5 L 0 9 z" fill="#ef4444" />
        </marker>
        <marker id="arrow-gray" viewBox="0 0 10 10" refX="6" refY="5" markerWidth="6" markerHeight="6" orient="auto-start-reverse">
          <path d="M 0 1 L 8 5 L 0 9 z" fill="#64748b" />
        </marker>
        <marker id="arrow-slate" viewBox="0 0 10 10" refX="6" refY="5" markerWidth="6" markerHeight="6" orient="auto-start-reverse">
          <path d="M 0 1 L 8 5 L 0 9 z" fill="#94a3b8" />
        </marker>
      </defs>

      
      <path class="flow-path path-in" d="M 280 20 L 225 35" marker-end="url(#arrow-blue)" />
      <text x="282" y="16" font-size="10" font-weight="700" fill="#0284c7" text-anchor="middle">O₂ In</text>

      
      <path class="flow-path path-out" d="M 115 35 L 60 20" marker-end="url(#arrow-slate)" />
      <text x="58" y="16" font-size="10" font-weight="700" fill="#64748b" text-anchor="middle">CO₂ Out</text>

      
      
      <path class="flow-path path-artery flow-dash" d="M 185 62 L 185 100" marker-end="url(#arrow-red)" />
      
      <path class="flow-path path-artery flow-dash" d="M 185 152 C 220 165, 220 185, 188 198" marker-end="url(#arrow-red)" />
      
      
      <path class="flow-path path-vein flow-dash" d="M 152 198 C 120 185, 120 165, 152 152" />
      <path class="flow-path path-vein flow-dash" d="M 155 100 L 155 62" marker-end="url(#arrow-gray)" />

      
      <g id="node-lungs" class="node-card" onclick="goToStep(0)">
        <rect x="110" y="24" width="120" height="42" />
        <text class="node-icon" x="135" y="45">🫁</text>
        <text class="node-title" x="160" y="49">Lungs</text>
      </g>

      
      <g id="node-heart" class="node-card" onclick="goToStep(1)">
        <rect x="110" y="105" width="120" height="46" />
        <text id="heart-icon" class="node-icon" x="135" y="128">❤️</text>
        <text class="node-title" x="160" y="132">Heart</text>
      </g>

      
      <g id="node-muscle" class="node-card" onclick="goToStep(2)">
        <rect x="100" y="192" width="140" height="44" />
        <text class="node-icon" x="125" y="214">🦵</text>
        <text class="node-title" x="150" y="218">Muscle</text>
      </g>
    </svg>
  </div>

  
  <div class="callout-box" id="callout">
    <div id="badge" class="badge badge-1">Step 1</div>
    <div id="callout-text" class="callout-text">Oxygen enters lungs</div>
  </div>

  
  <div class="controls">
    <button id="step-0" class="step-btn active" onclick="goToStep(0)">1. Inhale</button>
    <button id="step-1" class="step-btn" onclick="goToStep(1)">2. Pump</button>
    <button id="step-2" class="step-btn" onclick="goToStep(2)">3. Energy</button>
    <button id="step-3" class="step-btn" onclick="goToStep(3)">4. Exhale</button>
    <button id="playBtn" class="play-btn" onclick="togglePlay()" aria-label="Toggle Play">⏸</button>
  </div>

  <script>
    const stepsData = [
      { num: 1, cls: "badge-1", text: "Oxygen enters lungs with air", stageClass: "active-1" },
      { num: 2, cls: "badge-2", text: "Heart pumps oxygen-rich blood", stageClass: "active-2" },
      { num: 3, cls: "badge-3", text: "Muscle uses oxygen for energy", stageClass: "active-3" },
      { num: 4, cls: "badge-4", text: "Carbon dioxide returns & exhales", stageClass: "active-4" }
    ];

    let currentStep = 0;
    let timer = null;
    let isPlaying = true;

    const stageEl = document.getElementById('stage');
    const badgeEl = document.getElementById('badge');
    const calloutTextEl = document.getElementById('callout-text');
    const playBtnEl = document.getElementById('playBtn');

    function updateStep(idx) {
      currentStep = idx;
      const data = stepsData[idx];

      // Update stage class
      stageEl.className = 'stage ' + data.stageClass;

      // Update callout
      badgeEl.className = 'badge ' + data.cls;
      badgeEl.textContent = 'Step ' + data.num;
      calloutTextEl.textContent = data.text;

      // Update buttons
      for (let i = 0; i < 4; i++) {
        const btn = document.getElementById('step-' + i);
        if (i === idx) {
          btn.classList.add('active');
        } else {
          btn.classList.remove('active');
        }
      }
    }

    function goToStep(idx) {
      updateStep(idx);
      if (isPlaying) {
        resetTimer();
      }
    }

    function nextStep() {
      const next = (currentStep + 1) % stepsData.length;
      updateStep(next);
    }

    function resetTimer() {
      clearInterval(timer);
      timer = setInterval(nextStep, 3000);
    }

    function togglePlay() {
      isPlaying = !isPlaying;
      if (isPlaying) {
        playBtnEl.textContent = '⏸';
        resetTimer();
      } else {
        playBtnEl.textContent = '▶';
        clearInterval(timer);
      }
    }

    // Initialize
    updateStep(0);
    resetTimer();
  </script>
</body>
</html>

science.ks3.y2.t2.s2

Aligned learning resources

Related diagrams