Structure of long bone Macroscopic Neet amp Nursing students Medical Pathshala

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By the end of this section, you will be able to: • Identify the #anatomical #features of a #bone. • #Anatomical #functions of each part of the #bone. • PLEASE LIKE SHARE AND #SUBSCRIBE THIS CHANNEL AND SHOW YOUR SUPPORT. • #GROSS #ANATOMY OF #BONE • The #structure of a #long #bone allows for the #best #visualization of all of the parts of a bone (Figure 1). A #longbone has two parts: the #diaphysis and the #epiphysis. The diaphysis is the #tubular #shaft that runs between the #proximal and #distal ends of the bone. The hollow region in the diaphysis is called the #medullary #cavity, which is filled with yellow #marrow. The walls of the diaphysis are composed of #dense and #hard #compact bone. • • The wider section at each end of the bone is called the #epiphysis (plural = #epiphyses), which is filled with #spongy bone. #Red #marrow fills the #spaces in the #spongy bone. Each epiphysis meets the diaphysis at the #metaphysis, the #narrow #area that contains the #epiphyseal #plate (#growth #plate), a layer of #hyaline (transparent) #cartilage in a #growing bone. When the bone stops growing in early #adulthood (approximately 18–21 years), the #cartilage is replaced by #osseous tissue and the epiphyseal plate becomes an epiphyseal line. • The #medullary cavity has a #delicate membranous lining called the #endosteum (end- = “inside”; oste- = “bone”), where bone #growth, #repair, and #remodeling occur. The outer surface of the bone is covered with a #fibrous #membrane called the #periosteum (peri– = “around” or “surrounding”). The periosteum contains blood vessels, #nerves, and #lymphatic #vessels that #nourish #compact bone. #Tendons and #ligaments also attach to bones at the periosteum. The periosteum covers the entire outer surface #except where the epiphyses meet other bones to form #joints . In this region, the epiphyses are covered with articular cartilage, a thin layer of cartilage that #reduces #friction and acts as a #shock #absorber. • • Diagram of Long Bone :- https://drive.google.com/file/d/1-7yL...

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