Bone Dissection Essay

Cartilage tissue is a smooth, firm substance that protects ends of the bones from friction during movement and they can be found at the end of our bones in mobile joints, the front ends of the ribs, also in parts of our nose and ears.

A. long bones are the thickest midway down the diaphysis, where the stresses are the greatest.

Compact bone contains Haversian Systems, which are in concentric circles called lamellae. Haversian system contains a blood supply and the periosteum is located on the outside

Osteoblast- cells which build bone by removing calcium and phosphates form the blood in the presence of the enzymes alkaline phosphates secrete by

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 exercise, we will examine a fresh raw chicken bone to study bone

5. Why was the bone shortened? They had to add a plate so it had to be trimmed down for the pieces

The bony collar of long bones helps them withstand compressive stress by the mechanism described in #4A above (i.e. hydroxyapatite, weight-bearing pillars). In addition, long bones also withstand compressive forces by virtue of the spongy ("cancellous") bone in the epiphyses. The interlocking network of bony plates (called "trabeculae") found in spongy bone help to distribute the weight of the body out to the tough bony collar of the diaphysis. In this way, bony plates act much like the trusses or struts in old-time railroad bridges which distribute the weight of the train evenly over the entire bridge.

Materials for this laboratory included Microsoft excel to compile data, a pen and paper to record data, a 15cm ruler, string, a caliper, and a two meter ruler. Since bones often times vary in width in certain portions of the same bone due to the presence of joints and processes the bone was measured at the midpoint along its length for its true width. Measurements

The endosteum is a connective tissue that protects cavities in long bones. The endosteum covers the surface of cancellous bone and the medullary cavity, unlike the periosteum the endosteum is not dense irregular connective tissue. (Clark, 2005)

The outermost layer is a membrane called periosteum, a fibrous connective tissue responsible for protection, connected to fibers called Sharpey’s (perforating) fibers linking to the bone (Marieb, 2012). The external surface at the end of the bone is covered with articular cartilage, reducing joint friction (Marieb, 2012). Within the bone is a thin layer of compact bone called epiphyses, encompassing spongy bone and yellow marrow (Marieb, 2012).

Generally, bone can be classified into two categories according to its structure, cortical (compact) and trabecular (cancellous or spongy) bone. Cortical bone is stiff, with 5–10% porosity, and it makes up approximately 80% of skeletal bone, including cuboidal bones, flat bones, and the ends of long bones. Cortical bone is much denser, stiffer, and stronger than trabecular bone. The average strength of a compact human bone was 105 MPa in a longitudinal compression test, and was 131 MPa in a transversal compression test. In the same experiment, the average longitudinal strength in tension was 53 MPa [39]. In contrast, the porosity of trabecular bone is approximately 50–95%, which is higher than that of cortical bones. The surface area of the

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 is a living tissue that contain a blood vessel and nerves. It capable of moulding itself when it damaged.

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

Bone serves the organism at multiple levels: As a system, bones permit the organism to locomote effectively and to maintain posture by bearing loads without deformation, by providing rigid attachment sites for muscles and acting as a system of levers to amplify small movements. As an organ, bones protect the viscera and house the hemopoietic tissue (red marrow). As a tissue, bones serve as a reservoir of readily mobilizable calcium, an