Introduction The adult human skeletal system consists of 206 bones, but the skeletal system is much more than just bones. It also includes the network of tendons, ligaments and cartilage that connects them. Bones aren’t just solid white lumps of calcium, there are various elements that make up a single bone. A typical bone has a dense and thin yet tough outer layer, called the periosteum. Periosteum consists of an outer fibrous connective tissue layer, and an inner osteogenic layer. The fibrous layer is made of dense and irregular connective tissue containing many strong collagen fibres and fibroblast cells. Fibroblasts produce the collagen fibres and regenerate the fibrous layer as it wears down over time, or is injured by stress to the …show more content…
But it has other functions that include locomotion (in cooperation with muscles), which is the moving of the body. The bones also store our body’s supply of calcium and phosphorous, but perhaps the most important function takes place in the bone marrow. Bone marrow contains two main types of stem cells, which are unspecialised cells that can develop into any type of body cell, called haematopoietic and mesenchymal stem cells. Haematopoietic stem cells are responsible for the production of red blood cells, whereas mesenchymal stem cells’ main function is to produce the non-blood-cell components of marrow, including fat, cartilage, fibrous connective tissue (found in tendons and ligaments), stromal cells that support blood formation, and bone …show more content…
In leukaemia, the bone marrow produces abnormal white blood cells. These irregular cells attack the healthy white blood cells, affecting the function of the white blood cells. This disease can have a fatal effect, as well as being a type of cancer, the white blood cells’ primary function- to fight infections- is disrupted. This means that a person affected by leukaemia is more prone to dying from preventable or curable diseases, such as pneumonia, because their immune system has been weakened. There are various treatments available for leukaemia, but the type of treatment actually delivered to a patient depends on their individual circumstances. In most cases of acute leukaemia, treatment is started immediately after the disease is
The skeletal system is made up of cartilage and bone. Both bone and cartilage are connective tissues, that is, they are composed of cells in a matrix with intracellular fibers. Just imagine connective tissue as a gelatin salad with grapes and coconut. The grapes would represent cells, the gelatin the support material for matrix, and the pieces of coconut the intracellular fibers. By changing the amounts of each ingredient and adding extra substances, we can produce a material that is very hard like bone and can withstand weight or softer like cartilage which can be used as a cushioning material.
In this content am going to be talking and explaining the structure and function of the skeletal system. I will be talking about: Axial skeleton, Appendicular. Also highlighting the different types of bone such as long bones, short bones flat bones, irregular bones and sesamoid bones. I am also going to be talking about how your body is
The skeletal system works as the frame of the body and it is made up of two hundred and six various bones. The Sections used in the movements of the skeletal system are; the bones, Joints, ligaments and tendons. This system is also divided into two sections known as the Axial and Appendicular skeleton.
B. Using your chicken bone, how does the texture of articular cartilage (or hyaline cartilage) compare to that of periosteum? Note: Articular cartilage (made of hyaline cartilage) is found on the ends of the bones. It absorbs compression and allows for smooth movement.
Bones are dynamic tissues that undergo changes need to maintain bone and calcium homeostasis through a process called bone remodeling. Bone remodeling is an essential process that repairs damaged bone and maintains mineral homeostasis. This process is regulated by two main cells that perform opposite, but complementary function. Osteoblasts are the main bone forming cells that originate from mesenchymal stem cell lineage. Osteoblasts produce bone matrix which they later mineralized to form bone. During the process of bone formation, matured osteoblasts usually get trapped in the bone matrix and become osteocytes. Osteoclasts on the other hand, are the main bone resorbing cells; they resorb bone producing proteolytic enzyme and acid. In response
A bone typically has a dense and tough outer layer. Then it is a layer of spongy bone, which is lighter and more flexible. In the middle
The skeletal system is composed of bones and joints that are made up of many cells, protein fibres, and minerals. The skeleton provides support and protection for soft tissues that make up the rest of the body.
The skeletal system is made up of bones and joints. Bones are a dry dense tissue that is composed of calcium phosphorous and organic matter. The bones are protected and covered by a layer of fibrous connective tissue membrane called the periosteum (Brown, et al., 2015, p. 1547). There are two basic types of bone tissue: Compact Bone and Spongy Bone. Compact bones are dense smooth bones, while Spongy bones are composed of small needle-like pieces of bones and open space. Bones are then categorised according to the shape of the bone into four groups: long, short, flat and irregular. Long bones characteristically are typically longer then they are wide and generally have a shaft with heads at either ends e.g. the humerus. They are mainly compact bones. Short bones
The primary cellular components of bone tissue are osteoblasts and osteocytes, and these are distinguished by their location and their function.1 The osteoblast is the bone-forming cell that eventually becomes an osteocyte. During this intermediate changeover, the cells are referred to as intermediate cells. “Bone matrix is comprised of three elements: organic, mineral, and fluid. Organic components constitute 39% of the total bone volume, which contains 95% type I collagen and 5% proteoglycans. Minerals include primarily calcium hydroxyapatite crystals and contribute about half of total bone volume.”1 Within the matrix, collagen fibers are responsible for providing tensile strength. Eventually, calcification and ossification of the fibrous matrix forms individual bony trabeculae that together constitute a primary ossification center.2 The arrangement of the collagen/trabeculae along the length of the bone give the bone its tensile strength; the resistive strength against bending/breaking.1,2 The density of the bone is provided by calcium salts which are necessary to provide resistive strength against compressive forces, such as load/weight bearing activities.1 Stresses from weight bearing and using muscles provide the necessary stimulus for the formation and organization of collagen/trabeculae to form architecturally strong bones. Typically, when no injury or disease is present, bone
Bones are not only thick and hard, they are also slightly elastic. Without elasticity they would break too easily. They are composed mainly of bone tissue or osseous tissue. The skeletal system is very dynamic as the bones are changing all the time, they remodel themselves depending on usage or functional demand therefore the structure and function of the skeletal system are
Have you ever thought about how humans would be without bones? They would not be able to function the way that they do now if it did not have bones. The skeletal system is a highly important system in the human body, it functions as support, protection, and creation of red blood cells. This system is composed of bones and joints, an average adult contains 206 bone and an average child contains 270 bones because as a person grows the bones fuse together to create a single bone. The skeletal system is divided in to two major category: the axial skeleton and the appendicular skeleton. The axial skeleton has 80 bones in the midline axis which contains the bones of the head and the trunk; while the appendicular axis has 126 bones which include the bones from the limbs, pectoral and pelvic regions. There are only a few select bones that are mainly affected by the Paget disease these include the pelvis and the tibia which belong to the appendicular axis; however, other bones that could be affected are the femur, spine, skull, clavicle, and fibula.
The human adult body consists of 206 individual bones. These bones are divided or rather arranged into two major divisions or parts. One of which is the Axial skeleton. The Axial
Bones are made of connective tissue reinforced with calcium and specialized bone cells. Most bones also contain bone marrow, where blood cells are made.
The human body is made up of 206 bones held together by ligaments, whilst joints provide mobility. Ligaments are a band of tough, flexible connective tissue which connects two bones. The skeleton forms a frame at which the internal organs rest and over which muscles and skin is layered over.
The human skeletal system is comprised of both fused and individual bones; supported and supplemented by ligaments, tendons, muscles and cartilage. The skeletons purpose is to protect and support the delicate internal organs and provide a framework that allows the body to stand upright and move. It also produces blood cells and stores minerals that our body needs to function effectively.