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🦴 HADDIYAN (BONES) - Poori Jaankari

Haddi kya hoti hai?

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Haddiyon ke Kaam (Functions of Bones)

1. Sharir ko support dena - Body ka structure banate hain
2. Vital organs ki suraksha - Jaise skull brain ko bachata hai, ribs dil aur lungs ko
3. Calcium aur Phosphorus ka bhandar - Body mein minerals store karte hain
4. Movement mein madad - Muscles ke liye lever ki tarah kaam karte hain
5. Blood banana - Andari cavity mein bone marrow hota hai jo blood cells banata hai

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Haddiyon ke Prakar (Types of Bones) - Shape ke Aadhaar par

1. 🦵 Long Bones (Lambi Haddiyan)

• Aakar: Tubular (nali jaisi)
• Udaharan: Humerus (upper arm), Femur (thigh bone), Tibia, Fibula
• Yeh haddiyan andar se khokhi hoti hain - medullary cavity hoti hai

2. 🤲 Short Bones (Choti Haddiyan)

• Aakar: Cuboidal (ghane)
• Udaharan: Wrist ki haddiyan (Carpal bones), Ankle ki haddiyan (Tarsal bones)
• Length, width aur height roughly barabar hoti hai

3. 🧠 Flat Bones (Chapta Haddiyan)

• Aakar: Do compact bone plates ke beech spongy bone
• Udaharan: Skull, Scapula (shoulder blade), Ribs, Sternum
• Protection aur muscle attachment ke liye hoti hain

4. 🔀 Irregular Bones (Aniyamit Haddiyan)

• Aakar: Alag-alag, koi ek aakar nahin
• Udaharan: Chehre ki haddiyan (facial bones), Vertebrae (reedh ki haddi)

5. 🌰 Sesamoid Bones (Sesamoid Haddiyan)

• Tendons ke andar develop hoti hain
• Sabse badi: Patella (ghutne ki takdi/kneecap)
• Haath aur paon ke tendons mein bhi milti hain

6. 💨 Pneumatic Bones (Hawa se bhari haddiyan)

• Andar air-filled spaces (sinuses) hote hain
• Udaharan: Facial skeleton ki haddiyan, Paranasal sinuses

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Haddiyon ki Sanrachna (Structure of Bone)

2 prakar ki bone tissue hoti hai:

Haddi ke Bhag:

• Periosteum - Haddi ke upar ki fibrous membrane; nai haddi banane mein madad karti hai
• Medullary Cavity - Beech ki cavity jisme bone marrow hota hai
• Epiphysis - Haddi ke donon sir (ends)
• Diaphysis - Haddi ka beech ka hissa (shaft)
• Metaphysis - Epiphysis aur diaphysis ke beech
• Growth Plate (Epiphyseal Plate) - Bachchon mein haddi badhti hai yahan se

Osteons (Haversian System):

• Compact bone ki structural unit hai
• Har osteon mein Haversian canal hota hai jisme blood vessels aur nerves hoti hain
• Lamellae (concentric rings) osteon ke aas-paas hoti hain

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Haddiyon mein Cells (Bone Cells)

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Sharir mein Haddiyon ki Sankhya (Number of Bones)

• Adult human body mein total 206 haddiyan hoti hain
• Naye janme bachche mein 270-300 haddiyan hoti hain (jo baad mein milkar 206 ban jati hain)

Haddiyon ka Vibhajan:

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Mahatvapurn Haddiyan (Important Bones)

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Haddiyon ki Visheshataen

• Haddiyan vascular hoti hain - Har haddi mein ek "nutrient artery" hoti hai
• Periosteum ke bina haddi jeevit nahin reh sakti
• Nerves bhi blood vessels ke saath haddi mein jaati hain
• Haddiyan remodel hoti rehti hain - puri zindagi mein

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📖 Source: Gray's Anatomy for Students & General Anatomy (THIEME Atlas)