From which arteries is blood supplied to bone?
**Core Concept**
Bones receive blood supply from multiple arteries, including the **nutrient artery**, **epiphyseal artery**, **metaphyseal artery**, and **periosteal arteries**. This vascular network ensures oxygen and nutrient delivery to bone tissue, with the nutrient artery being the primary supplier to the diaphysis.
**Why the Correct Answer is Right**
The **nutrient artery** (via the nutrient foramen) is the main vascular supply to the **diaphysis**, while **epiphyseal arteries** supply the **epiphysis**. **Metaphyseal arteries** serve the **metaphysis**, and **periosteal arteries** (from surrounding muscles/skin) contribute to the **periosteum**. This multi-source supply is critical for bone growth, repair, and survival, especially in long bones.
**Why Each Wrong Option is Incorrect**
- **Option A:** If it lists only the nutrient artery, it ignores epiphyseal/metaphyseal/periosteal arteries.
- **Option B:** If it includes the epiphyseal artery but excludes others, itβs incomplete.
- **Option C:** If it mentions only periosteal arteries, it neglects the nutrient and metaphyseal components.
**Clinical Pearl / High-Yield Fact**
The **nutrient artery** is the most critical vessel for bone viability, especially in long bones. Avascular necrosis (e.g., femoral head) often results from injury to the **epiphyseal artery**. Remember: bones are supplied by **nutrient, epiphyseal, metaphyseal, and periosteal** arteries.
**Correct Answer: D. Nutrient, epiphyseal, metaphyseal, and periosteal arteries**