人體約 60% 由水組成,支持著營養運輸、體溫調節和細胞功能等基本過程。這種高含水量突顯了水分對維持健康的重要性。腎臟過濾血液,清除毒素並產生尿液。它們調節電解質平衡和血壓,因此對於維持內部穩定和防止有害廢物堆積至關重要。虹膜調節瞳孔大小以控制進光量。這種自動反應保護視網膜,確保清晰的視力,並使視覺感知適應不同的環境和照明條件。味蕾集中在舌頭的乳突上,探測甜、鹹、苦、酸和鮮味。這些結構幫助人類享受食物並識別潛在的有害物質。咬肌產生顯著的咬合力,使咀嚼和分解食物成為可能。它的力量支持消化,並反映了適應消費多樣和堅韌食物的進化。靜息心率在60-100次/分鐘之間表示心血管功能良好。較低的心率通常表明身體狀況良好,而持續較高的心率可能預示著壓力或健康問題。肝臟獨特地再生失去的組織,使其在受傷或手術後恢復。這種非凡的能力即使在受損時也能支持排毒、代謝和營養儲存。成年人通常有206塊骨頭,儘管嬰兒出生時骨頭更多,隨著時間的推移會融合。這個骨骼框架提供結構支持,保護器官,並通過關節和肌肉實現運動。肝臟是最大的內臟器官,執行數百種功能,包括血液解毒、產生膽汁和調節新陳代謝。它的大小反映了其關鍵的多任務處理能力。小腦精細調節運動、平衡和協調,確保平穩的身體活動。它將感官輸入與運動指令整合,以保持姿勢、精確度和穩定運動。血紅蛋白結合氧氣並含有鐵,當氧合時會變成紅色。這種必需蛋白質將氧氣輸送到組織並支持全身的細胞能量生產。人類檢測到甜、鹹、酸、苦和鮮味。這些味覺類別有助於評估食物的營養價值和安全性,指導飲食選擇並影響食慾和消化。鐙骨位於中耳,將聲音振動傳遞到內耳。它微小的尺寸使其能夠精確移動,對於準確聽覺和聲音感知至關重要。碳水化合物分解成葡萄糖,是身體的主要燃料。細胞依賴葡萄糖獲取能量,尤其是大腦,使碳水化合物對於日常功能和身體表現至關重要。胰臟釋放胰島素以調節血糖水平。這種激素使細胞能夠吸收葡萄糖,維持能量平衡並防止血糖危險升高。消化從口腔開始,唾液和咀嚼將食物分解。唾液中的酶開始碳水化合物的消化,為食物在消化道中的進一步處理做準備。表皮容納黑色素細胞,產生黑色素色素。這種色素可防止紫外線輻射,影響膚色,並有助於防止陽光照射造成的DNA損傷。白血球識別並攻擊病原體。它們適應新威脅並協調免疫反應,使其對保護和長期健康至關重要。大腸從未消化的食物中吸收水分,形成固體廢物。這個過程可以防止脫水,並有助於維持身體適當的液體平衡。心臟有四個腔室——兩個心房和兩個心室——共同循環血液。這種結構確保富氧血液到達組織,並將脫氧血液返回進行再氧合。二氧化碳在細胞呼吸過程中產生,並通過呼氣排出。消除這種氣體可以防止有害積聚,並維持身體的酸鹼平衡。骨髓通過造血過程產生紅血球。這些細胞將氧氣輸送到組織,因此持續生產對於生存和能量至關重要。下丘腦監測內部溫度並觸發冷卻或加熱反應。它協調出汗、顫抖和血流調節以維持體內平衡。股骨,或稱大腿骨,支撐體重並使人能夠行走。它的長度和強度反映了它在運動和整體骨骼穩定性中的關鍵作用。手包含許多小骨頭,可以實現精細的運動技能和靈活性。其複雜的結構支持抓握、書寫和無數需要精確的日常動作。膽囊儲存肝臟產生的膽汁,在消化過程中釋放它以幫助分解脂肪。這個儲存系統確保了脂肪的有效處理。小腸約22英尺長,最大化營養吸收。其摺疊的內襯增加了表面積,從而實現高效的消化和營養物質輸送到血液中。肌腱將肌肉連接到骨骼,傳遞力量以產生運動。其堅韌的纖維結構確保了體力活動期間的強度和穩定性。肩部的球窩關節允許廣泛的運動範圍,實現旋轉、舉起和伸展。它的靈活性支持日常任務所需的複雜手臂動作。肝臟分解毒素、代謝藥物並過濾有害物質。其解毒作用保護身體並支持整體代謝健康。人類通常有 12 對肋骨,形成一個保護籠,圍繞著重要器官。這種結構支持呼吸並保護心臟和肺部免受傷害。血小板聚集在受傷部位形成凝塊,防止過度出血。它們的作用對於傷口癒合和保護身體免受危險失血至關重要。橫膈膜收縮和放鬆,將空氣吸入和排出肺部。其節律性運動對於呼吸和向身體供氧至關重要。皮膚覆蓋整個身體,保護免受病原體侵害,調節體溫,並提供感官信息。其大小和功能使其對於生存和整體健康至關重要。韌帶通過連接骨骼來穩定關節。它們靈活但堅固的結構有助於保持對齊並防止運動期間受傷。喉部包含聲帶,聲帶振動產生聲音。它還在吞嚥時保護氣道,使其對溝通和安全至關重要。O型陰性血缺乏A、B和Rh抗原,使其可以安全地輸給大多數受血者。這種多功能性使其在緊急情況下至關重要。大腦約有860億個神經元,形成複雜的網絡,用於思考、記憶、感覺和運動。這些連接使人類具有智慧和適應能力。黑色素由黑色素細胞產生,決定皮膚、頭髮和眼睛的顏色。它吸收紫外線輻射,保護細胞免受損害,並促進人類外觀的多樣性。內耳的前庭系統感知運動和頭部位置,幫助維持平衡。它與視覺和肌肉協同工作,以保持身體穩定和定向。You scored 0 out of 40You scored 1 out of 40You scored 2 out of 40You scored 3 out of 40You scored 4 out of 40You scored 5 out of 40You scored 6 out of 40You scored 7 out of 40You scored 8 out of 40You scored 9 out of 40You scored 10 out of 40You scored 11 out of 40You scored 12 out of 40You scored 13 out of 40You scored 14 out of 40You scored 15 out of 40You scored 16 out of 40You scored 17 out of 40You scored 18 out of 40You scored 19 out of 40You scored 20 out of 40You scored 21 out of 40You scored 22 out of 40You scored 23 out of 40You scored 24 out of 40You scored 25 out of 40You scored 26 out of 40You scored 27 out of 40You scored 28 out of 40You scored 29 out of 40You scored 30 out of 40You scored 31 out of 40You scored 32 out of 40You scored 33 out of 40You scored 34 out of 40You scored 35 out of 40You scored 36 out of 40You scored 37 out of 40You scored 38 out of 40You scored 39 out of 40You scored 40 out of 40
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