diff --git a/frontend/src/components/cellDivision/CellDivisionScene.tsx b/frontend/src/components/cellDivision/CellDivisionScene.tsx
index 2a3cb7f..237f1ca 100644
--- a/frontend/src/components/cellDivision/CellDivisionScene.tsx
+++ b/frontend/src/components/cellDivision/CellDivisionScene.tsx
@@ -2,15 +2,19 @@ import { useMemo, useRef } from "react";
 import { useFrame } from "@react-three/fiber";
 import * as THREE from "three";
 import type { Stage } from "../../data/cellDivisionStages.js";
+import type { CellComponentId } from "../../data/cellDivisionComponents.js";
 
 // Cena 3D ilustrativa (mesmo princípio do CellDiagram3D.tsx e do
 // Mannequin.tsx: sem malha real disponível pra esse conteúdo, então
 // desenhamos à mão com primitivas do Three.js) — recebe só o ESTÁGIO alvo
 // atual (`stage`) e anima suavemente toda célula/cromátide até lá sempre
 // que o estágio muda, via interpolação por frame (useFrame), sem precisar
-// de nenhuma biblioteca de animação.
+// de nenhuma biblioteca de animação. Também aceita clique nos componentes
+// (cromossomo, centrossomo, fibra) — ver `onSelect`.
 
 const MAX_CELLS = 4;
+const HIGHLIGHT = new THREE.Color("#22d3ee");
+const BLACK = new THREE.Color(0x000000);
 
 // Fator de suavização independente de framerate: a cada frame, anda uma
 // fração `k` do caminho que falta até o alvo — converge suave em ~0.4s
@@ -19,20 +23,31 @@ function smoothing(delta: number, halfLifeSeconds = 0.18) {
   return 1 - Math.pow(0.5, delta / halfLifeSeconds);
 }
 
-function ChromatidShape({ color }: { color: string }) {
+interface SelectionProps {
+  selected: CellComponentId | null;
+  onSelect: (id: CellComponentId) => void;
+}
+
+function ChromatidShape({ color, isSelected }: { color: string; isSelected: boolean }) {
+  const matProps = {
+    color,
+    roughness: 0.5,
+    emissive: isSelected ? HIGHLIGHT : BLACK,
+    emissiveIntensity: isSelected ? 0.8 : 0,
+  };
   return (
     <group>
       <mesh position={[-0.045, 0.08, 0]} rotation={[0, 0, Math.PI / 7]}>
         <capsuleGeometry args={[0.022, 0.14, 3, 6]} />
-        <meshStandardMaterial color={color} roughness={0.5} />
+        <meshStandardMaterial {...matProps} />
       </mesh>
       <mesh position={[0.045, 0.08, 0]} rotation={[0, 0, -Math.PI / 7]}>
         <capsuleGeometry args={[0.022, 0.14, 3, 6]} />
-        <meshStandardMaterial color={color} roughness={0.5} />
+        <meshStandardMaterial {...matProps} />
       </mesh>
       <mesh>
         <sphereGeometry args={[0.03, 10, 10]} />
-        <meshStandardMaterial color={color} roughness={0.5} />
+        <meshStandardMaterial {...matProps} />
       </mesh>
     </group>
   );
@@ -44,7 +59,15 @@ interface ChromatidTargetWorld {
   color: string;
 }
 
-function AnimatedChromatid({ id, targets }: { id: string; targets: Map<string, ChromatidTargetWorld> }) {
+function AnimatedChromatid({
+  id,
+  targets,
+  selected,
+  onSelect,
+}: {
+  id: string;
+  targets: Map<string, ChromatidTargetWorld>;
+} & SelectionProps) {
   // Posição/rotação são controladas 100% via useFrame (nunca como prop
   // JSX reativa) — se passássemos `position={...}` no JSX, o
   // react-three-fiber reaplicaria (e "teleportaria") o objeto pra lá toda
@@ -65,8 +88,14 @@ function AnimatedChromatid({ id, targets }: { id: string; targets: Map<string, C
   });
 
   return (
-    <group ref={ref}>
-      <ChromatidShape color={initialColor} />
+    <group
+      ref={ref}
+      onClick={(e) => {
+        e.stopPropagation();
+        onSelect("cromossomo");
+      }}
+    >
+      <ChromatidShape color={initialColor} isSelected={selected === "cromossomo"} />
     </group>
   );
 }
@@ -83,6 +112,8 @@ interface CellSlotState {
 function AnimatedCellSlot({
   target,
   state,
+  selected,
+  onSelect,
 }: {
   target: {
     center: [number, number, number];
@@ -93,7 +124,7 @@ function AnimatedCellSlot({
     elongated: number;
   } | null;
   state: CellSlotState;
-}) {
+} & SelectionProps) {
   const groupRef = useRef<THREE.Group>(null);
   const membraneRef = useRef<THREE.Mesh>(null);
   const membraneMatRef = useRef<THREE.MeshStandardMaterial>(null);
@@ -139,9 +170,17 @@ function AnimatedCellSlot({
     }
   });
 
+  const centrosomeSelected = selected === "centrossomo";
+  const fiberSelected = selected === "fibras";
+
   return (
     <group ref={groupRef}>
-      {/* membrana plasmática — translúcida, não recebe clique (só decorativa) */}
+      {/* membrana plasmática e envelope nuclear: sem raycast (`raycast={() =>
+          null}`) de propósito — sendo "cascas" que envolvem tudo o resto,
+          elas sempre seriam o primeiro acerto de qualquer raio de clique,
+          impedindo o clique de alcançar cromossomo/centrossomo/fibra por
+          dentro. Continuam explicáveis pela lista de componentes no
+          painel (CellDivisionPage.tsx), só não são clicáveis AQUI. */}
       <mesh ref={membraneRef} raycast={() => null}>
         <sphereGeometry args={[0.8, 28, 28]} />
         <meshStandardMaterial
@@ -153,7 +192,6 @@ function AnimatedCellSlot({
           depthWrite={false}
         />
       </mesh>
-      {/* envelope nuclear — esfera um pouco menor, desfaz/refaz conforme a fase */}
       <mesh raycast={() => null}>
         <sphereGeometry args={[0.42, 24, 24]} />
         <meshStandardMaterial ref={envelopeMatRef} color="#c4b5fd" transparent opacity={0} depthWrite={false} />
@@ -163,9 +201,20 @@ function AnimatedCellSlot({
           da prófase. */}
       <group ref={centrosomesRef}>
         {[-1, 1].map((side) => (
-          <mesh key={side} position={[side * 0.65, 0, 0]}>
+          <mesh
+            key={side}
+            position={[side * 0.65, 0, 0]}
+            onClick={(e) => {
+              e.stopPropagation();
+              onSelect("centrossomo");
+            }}
+          >
             <sphereGeometry args={[0.035, 10, 10]} />
-            <meshStandardMaterial color="#f8fafc" />
+            <meshStandardMaterial
+              color="#f8fafc"
+              emissive={centrosomeSelected ? HIGHLIGHT : BLACK}
+              emissiveIntensity={centrosomeSelected ? 0.8 : 0}
+            />
           </mesh>
         ))}
       </group>
@@ -178,9 +227,21 @@ function AnimatedCellSlot({
                 key={i}
                 position={[side * 0.65 + side * -0.32, offset * 0.6, offset]}
                 rotation={[0, 0, side > 0 ? Math.PI / 2 + offset * 0.3 : -Math.PI / 2 + offset * 0.3]}
+                onClick={(e) => {
+                  e.stopPropagation();
+                  onSelect("fibras");
+                }}
               >
-                <cylinderGeometry args={[0.004, 0.004, 0.64, 4]} />
-                <meshStandardMaterial color="#f8fafc" transparent opacity={0.4} />
+                {/* raio um pouco maior só pra facilitar o clique — a fibra
+                    visual continua fina, isso é puramente a área alvo */}
+                <cylinderGeometry args={[0.02, 0.02, 0.64, 6]} />
+                <meshStandardMaterial
+                  color="#f8fafc"
+                  transparent
+                  opacity={fiberSelected ? 0.9 : 0.4}
+                  emissive={fiberSelected ? HIGHLIGHT : BLACK}
+                  emissiveIntensity={fiberSelected ? 0.6 : 0}
+                />
               </mesh>
             ))}
           </group>
@@ -190,7 +251,7 @@ function AnimatedCellSlot({
   );
 }
 
-export function CellDivisionScene({ stage }: { stage: Stage }) {
+export function CellDivisionScene({ stage, selected, onSelect }: { stage: Stage } & SelectionProps) {
   // Estado imperativo (fora do React) por slot de célula — persiste entre
   // mudanças de estágio pra animação continuar de onde estava, sem exigir
   // que o número de células seja o mesmo do estágio anterior.
@@ -235,11 +296,11 @@ export function CellDivisionScene({ stage }: { stage: Stage }) {
       <directionalLight position={[-2, -1, -2]} intensity={0.3} />
 
       {cellStates.map((state, i) => (
-        <AnimatedCellSlot key={i} target={stage.cells[i] ?? null} state={state} />
+        <AnimatedCellSlot key={i} target={stage.cells[i] ?? null} state={state} selected={selected} onSelect={onSelect} />
       ))}
 
       {chromatidIds.map((id) => (
-        <AnimatedChromatid key={id} id={id} targets={chromatidTargets} />
+        <AnimatedChromatid key={id} id={id} targets={chromatidTargets} selected={selected} onSelect={onSelect} />
       ))}
     </>
   );
diff --git a/frontend/src/data/cellDivisionComponents.ts b/frontend/src/data/cellDivisionComponents.ts
new file mode 100644
index 0000000..985cb85
--- /dev/null
+++ b/frontend/src/data/cellDivisionComponents.ts
@@ -0,0 +1,67 @@
+// Glossário dos componentes que aparecem na cena 3D de mitose/meiose —
+// clicável tanto direto no modelo 3D (cromossomos, centrossomos, fibras)
+// quanto pela lista no painel (que também cobre membrana e envelope
+// nuclear, que por design não recebem clique 3D — ver nota em
+// CellDivisionScene.tsx sobre por que a "casca" que envolve tudo não pode
+// ter raycast, senão intercepta o clique destinado ao que está dentro).
+export type CellComponentId =
+  | "membrana"
+  | "envelope"
+  | "cromossomo"
+  | "centromero"
+  | "centrossomo"
+  | "fibras";
+
+export interface CellComponentInfo {
+  id: CellComponentId;
+  label: string;
+  clickable3d: boolean;
+  description: string;
+}
+
+export const CELL_COMPONENTS: CellComponentInfo[] = [
+  {
+    id: "membrana",
+    label: "Membrana Plasmática",
+    clickable3d: false,
+    description:
+      "Envolve toda a célula e controla o que entra e sai dela. Na citocinese, ela se estrangula ao meio (sulco de clivagem) até se dividir em duas membranas independentes, uma pra cada célula-filha.",
+  },
+  {
+    id: "envelope",
+    label: "Envelope Nuclear",
+    clickable3d: false,
+    description:
+      "Membrana dupla que separa o DNA do restante da célula durante a interfase. Se desfaz na prófase — só assim as fibras do fuso, que ficam no citoplasma, conseguem alcançar os cromossomos — e se reforma na telófase ao redor de cada novo conjunto de cromossomos.",
+  },
+  {
+    id: "cromossomo",
+    label: "Cromossomo (cromátide)",
+    clickable3d: true,
+    description:
+      "DNA condensado e enrolado em proteínas (histonas), carregando os genes. Cada cor no modelo representa um cromossomo diferente. Quando duplicado (fase S), tem 2 cromátides-irmãs idênticas — o \"X\" clássico; depois de se separarem (anáfase), cada cromátide passa a ser um cromossomo independente.",
+  },
+  {
+    id: "centromero",
+    label: "Centrômero",
+    clickable3d: false,
+    description:
+      "A região que mantém as duas cromátides-irmãs de um cromossomo duplicado unidas (o \"cruzamento\" do X). É ali que as fibras do fuso se prendem (numa estrutura chamada cinetócoro) pra puxar cada cromátide pra um polo na anáfase.",
+  },
+  {
+    id: "centrossomo",
+    label: "Centrossomo",
+    clickable3d: true,
+    description:
+      "Organiza os microtúbulos da célula. Se duplica na interfase (por isso aparecem 2, desde a G2) e migra pra polos opostos, virando o ponto de partida das fibras do fuso.",
+  },
+  {
+    id: "fibras",
+    label: "Fibras do Fuso (microtúbulos)",
+    clickable3d: true,
+    description:
+      "\"Cabos\" de microtúbulos que saem dos centrossomos e se prendem ao centrômero de cada cromossomo. São elas que empurram/puxam os cromossomos — primeiro alinhando-os na placa metafásica, depois puxando as cromátides-irmãs (ou os homólogos, na Meiose I) pra polos opostos na anáfase.",
+  },
+];
+
+export const CELL_COMPONENT_BY_ID = new Map(CELL_COMPONENTS.map((c) => [c.id, c]));
diff --git a/frontend/src/routes/CellDivisionPage.tsx b/frontend/src/routes/CellDivisionPage.tsx
index 1872560..c307db9 100644
--- a/frontend/src/routes/CellDivisionPage.tsx
+++ b/frontend/src/routes/CellDivisionPage.tsx
@@ -9,6 +9,7 @@ import {
   MEIOSIS_II_ERROR_STAGES,
 } from "../data/cellDivisionStages.js";
 import { GENETIC_SYNDROMES, ERROR_MECHANISM_LABELS, type ErrorMechanism } from "../data/geneticSyndromes.js";
+import { CELL_COMPONENTS, CELL_COMPONENT_BY_ID, type CellComponentId } from "../data/cellDivisionComponents.js";
 
 type Mode = "mitose" | "meiose" | "erros";
 type ErrorType = "meiose1" | "meiose2";
@@ -69,6 +70,7 @@ export default function CellDivisionPage() {
   const [leftOpen, setLeftOpen] = useState(false);
   const [rightOpen, setRightOpen] = useState(false);
   const [showSyndromeModal, setShowSyndromeModal] = useState(false);
+  const [selectedComponent, setSelectedComponent] = useState<CellComponentId | null>(null);
 
   const stages = useMemo(() => {
     if (mode === "mitose") return MITOSIS_STAGES;
@@ -250,7 +252,7 @@ export default function CellDivisionPage() {
         </button>
 
         <Canvas dpr={[1, 1.5]} camera={{ position: [0, 1.4, 5.4], fov: 42 }}>
-          <CellDivisionScene stage={stage} />
+          <CellDivisionScene stage={stage} selected={selectedComponent} onSelect={setSelectedComponent} />
           <CameraControls makeDefault minDistance={2} maxDistance={12} />
         </Canvas>
 
@@ -320,6 +322,35 @@ export default function CellDivisionPage() {
         <h2 className="text-lg font-semibold text-white leading-snug">{stage.label}</h2>
         <p className="text-sm text-slate-300 leading-relaxed">{stage.description}</p>
 
+        <div className="pt-3 border-t border-white/10 space-y-2">
+          <p className="text-[11px] uppercase tracking-wide text-slate-500">
+            Componentes da célula <span className="normal-case text-slate-600">— clique num deles (na cena ou aqui)</span>
+          </p>
+          <div className="flex flex-wrap gap-1.5">
+            {CELL_COMPONENTS.map((c) => (
+              <button
+                key={c.id}
+                onClick={() => setSelectedComponent(c.id)}
+                className={`text-xs px-2.5 py-1.5 rounded-full border ${
+                  selectedComponent === c.id
+                    ? "bg-accent text-white border-accent"
+                    : "border-white/10 bg-white/5 text-slate-300 hover:bg-white/10"
+                }`}
+              >
+                {c.label}
+              </button>
+            ))}
+          </div>
+          {selectedComponent && (
+            <div className="rounded-lg border border-accent/30 bg-accent/10 p-2.5 mt-1">
+              <p className="text-sm font-medium text-white">{CELL_COMPONENT_BY_ID.get(selectedComponent)?.label}</p>
+              <p className="text-xs text-slate-300 mt-1 leading-relaxed">
+                {CELL_COMPONENT_BY_ID.get(selectedComponent)?.description}
+              </p>
+            </div>
+          )}
+        </div>
+
         {mode === "erros" && (
           <div className="pt-3 border-t border-white/10 space-y-2">
             <p className="text-[11px] uppercase tracking-wide text-slate-500">Síndromes ligadas a este erro</p>
diff --git a/frontend/tsconfig.tsbuildinfo b/frontend/tsconfig.tsbuildinfo
index b4aed43..3e2667f 100644
--- a/frontend/tsconfig.tsbuildinfo
+++ b/frontend/tsconfig.tsbuildinfo
@@ -1 +1 @@
-{"root":["./src/app.tsx","./src/main.tsx","./src/vite-env.d.ts","./src/components/celldiagram3d.tsx","./src/components/clippingcontrols.tsx","./src/components/cookieconsent.tsx","./src/components/feedbackwidget.tsx","./src/components/layertoggle.tsx","./src/components/layout.tsx","./src/components/microscopydiagram.tsx","./src/components/onlinecounter.tsx","./src/components/quickregionnav.tsx","./src/components/searchnav.tsx","./src/components/skindiagram3d.tsx","./src/components/structureinfopanel.tsx","./src/components/celldivision/celldivisionscene.tsx","./src/components/viewer/exammarkers.tsx","./src/components/viewer/mannequin.tsx","./src/components/viewer/scene.tsx","./src/components/viewer/systemmodel.tsx","./src/data/celldivisionstages.ts","./src/data/geneticsyndromes.ts","./src/data/microscopycredits.ts","./src/data/microscopyhotspots.ts","./src/data/musclereferenceimages.ts","./src/data/physicalexam.ts","./src/hooks/usestructures.ts","./src/hooks/usesystemstructures.ts","./src/lib/analytics.ts","./src/lib/api.ts","./src/routes/adminstatspage.tsx","./src/routes/atlaspage.tsx","./src/routes/celldivisionpage.tsx","./src/routes/physicalexampage.tsx","./src/routes/planespage.tsx","./src/routes/quizpage.tsx","./src/store/useatlasstore.ts"],"version":"5.9.3"}
\ No newline at end of file
+{"root":["./src/app.tsx","./src/main.tsx","./src/vite-env.d.ts","./src/components/celldiagram3d.tsx","./src/components/clippingcontrols.tsx","./src/components/cookieconsent.tsx","./src/components/feedbackwidget.tsx","./src/components/layertoggle.tsx","./src/components/layout.tsx","./src/components/microscopydiagram.tsx","./src/components/onlinecounter.tsx","./src/components/quickregionnav.tsx","./src/components/searchnav.tsx","./src/components/skindiagram3d.tsx","./src/components/structureinfopanel.tsx","./src/components/celldivision/celldivisionscene.tsx","./src/components/viewer/exammarkers.tsx","./src/components/viewer/mannequin.tsx","./src/components/viewer/scene.tsx","./src/components/viewer/systemmodel.tsx","./src/data/celldivisioncomponents.ts","./src/data/celldivisionstages.ts","./src/data/geneticsyndromes.ts","./src/data/microscopycredits.ts","./src/data/microscopyhotspots.ts","./src/data/musclereferenceimages.ts","./src/data/physicalexam.ts","./src/hooks/usestructures.ts","./src/hooks/usesystemstructures.ts","./src/lib/analytics.ts","./src/lib/api.ts","./src/routes/adminstatspage.tsx","./src/routes/atlaspage.tsx","./src/routes/celldivisionpage.tsx","./src/routes/physicalexampage.tsx","./src/routes/planespage.tsx","./src/routes/quizpage.tsx","./src/store/useatlasstore.ts"],"version":"5.9.3"}
\ No newline at end of file