Difference Between Epiphysis And Diaphysis Key Difference .

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Difference Between Epiphysis and Diaphysiswww.differencebetween.comKey Difference - Epiphysis vs DiaphysisThe structure of a long bone is an important anatomical aspect in the study of bone physiology. Longbones are the most common bones found in the mammalian body. Long bones are mainly composedof the compact bone and spongy bone. The compact bone is the dense and hard part of the longbone. The spongy bone is the tissue filled cavity of the bone which is comparatively less hard andcontains the red bone marrow.The gross structure of the long bone consists of many parts; proximal and distal epiphysis, thespongy bone and the diaphysis consisting of the medullary cavity, endosteum, periosteum and thenutrient foramen. Thus, the anatomical structure of the long bone is divided into two main parts.They are the epiphysis and the diaphysis. The epiphysis is the wider section at each end of thebone and the diaphysis also known as the shaft of a long bone makes up most of the length ofthe bone. This is the key difference between epiphysis and diaphysis.What is Epiphysis?The epiphysis is the round end of the long bone. It is further categorized as the proximal epiphysisand the distal epiphysis. The structure of the epiphysis is round because it facilitates the contact withjoints and eases the function of motion around a joint. In order to facilitate this function the proximaland the distal epiphysis are covered with layers of articular cartilage. This cartilaginous layer allowsthe bones to slide past one another more easily.

Figure 01: Anatomy of a long boneThe interior of epiphysis is filled with spongy bone. Some epiphyses are also sites of red bloodcell formation in adults. In order to distinguish between the epiphysis and the diaphysis, a narrowarea known as metaphysis is present. The metaphysis contains the epiphyseal plate (growth plate), alayer of hyaline (transparent) cartilage in a growing bone. As the growth phase is completed the

cartilage is replaced by osseous tissue. Following which the epiphyseal plate becomes an epiphysealline.What is Diaphysis?The diaphysis or shaft of a long bone makes up most of the length of the bone. The diaphysis iscylindrical in shape. The epiphyseal line/plate in the metaphysis separates the diaphysis from theepiphysis. The diaphysis is the hard part of the long bone. It is composed of a thick layer of compactbone surrounding the medullary cavity.Figure 02: Periosteum and Endosteum of the DiaphysisThe medullary cavity is formed of two main parts; the endosteum and the periosteum. Theendosteum is the delicate membranous lining. The main functions of the endosteum are to participatein bone growth, repair, and bone remodeling. The periosteum is the outer surface of the bone. It iscovered with a fibrous membrane. The periosteum contains blood vessels, nerves,and lymphatic vessels and the main function is to provide nutrition for the compact bone. Periosteumalso acts as the site of attachment to tendons and ligaments. The periosteum is anchored and attachedto the underlying bone by a type of fibrous structures termed as Sharpey’s fibers. In adults, themedullary cavity can also be called the yellow marrow cavity, but in infants, it is called the redmarrow cavity, as it is filled with newly forming red blood cells.What are the Similarities Between Epiphysis and Diaphysis? They are two main parts of a long bone.Both are involved in bone growth and development.The epiphysis and the diaphysis are distinguished by the metaphysis containing the epiphyseal plate.

What is the Difference Between Epiphysis and Diaphysis?Epiphysis vs DiaphysisThe epiphysis is the wider section at each end ofthe long bone which is filled with spongy bone.Diaphysis is the shaft of a long bone, whichruns between the epiphysis.ShapeThe epiphysis is round in shape.Diaphysis is long and cylindrical in shape.TextureDiaphysis is a hard structure with compactbone.The epiphysis is cartilaginous structures andless hard.ComponentsDiaphysis is a medullary cavity with endosteumand periosteum.The epiphysis is a spongy bone.FunctionsFacilitates the contact with joints and ease thefunction of motion of the site of red blood cellformation in adults are the functions of theepiphysis.Endosteum involves in growth, repair, and boneremodeling and periosteum provides nutritionfor the compact bone, attachment to tendonsand ligaments.TypesProximal and distalNoneSummary - Epiphysis vs DiaphysisThe long bone is the major bone forming most bones such as the femur. In order to study physiologyand the functionality, it is much important to understand the structure of the long bone. It mainlyconsists of two parts the epiphysis, which is the end part of the bone required in the attachment andthe mid part between the proximal and the distal known as diaphysis (also known as the shaft). Thedifference between epiphysis and diaphysis is when epiphysis is the end of a long bone (the head)whereas the diaphysis is the shaft of the long bone.

Reference:1.OpenStax. “Anatomy and Physiology.” 6.3 Bone Structure Anatomy and Physiology. Accessed27 Sept. 2017. Available here2.“Structures of long bones.” Anatomy and Physiology. Accessed 27 Sept. 2017. Available hereImage Courtesy:1.'Anatomy of Long Bone'By OpenStax College - Anatomy & Physiology, Connexions. Jun 19,2013. (CC BY 3.0) via Commons Wikimedia2.'Periosteum and Endosteum'By OpenStax College - Anatomy & Physiology, Connexions. Jun 19,2013., (CC BY 3.0) via Commons WikimediaHow to Cite this Article?APA: Difference Between Epiphysis and Diaphysis. (2017, October 16). Retrieved (date), fromhttp://differencebetween.com/ difference-between-epiphysis-and-vs-diaphysis/MLA: " Difference Between Epiphysis and Diaphysis" Difference Between.Com. 16 October 2017. Web.Chicago: “Difference Between Epiphysis and Diaphysis.” Difference Between.Com.http://differencebetween.com/ difference-between-epiphysis-and-vs-diaphysis/ accessed (accessed [date]).Copyright 2010-2017 Difference Between. All rights reserved

The compact bone is the dense and hard part of the long bone. The spongy bone is the tissue filled cavity of the bone which is comparatively less hard and contains the red bone marrow. The gross structure of the long bone consists of many parts; proximal and distal epiphysis, the spongy bone and the diaphysis consisting of the medullary cavity, endosteum, periosteum and the

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A. Parts of a Long Bone 1. An expanded end of a long bone is called an_ . 2. An epiphysis articulates with _ . 3. Articular cartilage is located _ . 4. The shaft of a long bone is called a _ . 5. The _ is the widening part of the bone between the diaphysis and the epiphysis. .

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