Blood supply of long bone

Bone is richly vascular

Bone is metabolically very active
It has a very rich blood supply

In the fracture of the bone - blood supply of the bone plays considerable role in healing
In fracture of shaft of femur there can be considerable bleed from the vessels supplying the bone and can lead to shock

Sesamoid bones

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• Are small sesame seed like bones
• Develop in the tendon of muscles crossing a joint
• Lack medullary cavity
• Ossify after birth from multiple secondary centres

examples of sesamoid bones
• Patella in tendon of quadriceps femoris
• Fabella in tendon of lateral head of gastrocnemius

Spaces of hand - transverse section of hand

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Heart coronary arteries

Outline of heart with Coronary arteries