3. What type of bone is found in the head of the femur? What type of bone predominates in the diaphysis of the femur?…
Bones grow in three stages during life. The bone starts growing in the embryo at around 8 weeks. Ossification is the word for the formation of bone. There are osteoblasts that help form the bone and osteoclasts that eat away at old bone. Bones start off as cartilage, but then is replaced by bone. Connective tissue forms a sheet where the bones are going to be. These connective tissue sheets are highly invested with blood vessels. Some of the cells in the connective tissue sheets differentiate into osteoblasts. These osteoblasts begin laying down the bone extracellular matrix, called spongy bone. These osteoblasts get trapped within the hard matrix and are then called osteocytes. As time goes more and more osteoblasts form from the connective tissue sheets. The connective tissue sheets, as they become major producers of osteocytes, are no longer called connective tissue sheets. They are now called the bone's periosteum. But the newer osteoblasts made by the periosteum cannot enter the spongy bone. So, they begin to accumulate on the edges of the spongy…
10. what are the small spaces in the bone tissue that are holes in which osteocytes live…
Anatomy of a Long Bone. The shaft, or the main portion of the bone, is called the diaphysis. The diaphysis has a large medullary cavity, whose walls are composed of compact bone. The medullary cavity is lined with a thin membrane called the endosteum and is filled with yellow bone marrow. The enlarged ends of a long bone are called the epiphyses. The epiphyses are composed largely of spongy bone that contains the red bone marrow. The epiphyses are covered by a thin layer of hyaline cartilage in the joints. Areas of the bone other than at the joints are covered with a layer of fibrous connective tissue called the periosteum.…
ANSWER: Basically it's just exercise. Moderate weight lifting or walking stresses bones, which help build and retain bone mass. If bones are not being used, then they will lose their mass.…
*Despite their simple appearance, bones are complex and dynamic living tissues that are remodeled continuously.…
Bone is a specialised, strong, flexible connective tissue and is the main component of the adult skeleton. Unlike hyaline and fibrocartilage, bone is supplied with nerves and blood vessels. Epiphyseal veins carry the blood away from the long bones of the body and periosteal arteries, which are also accompanied by nerves, carry blood to the bones. It provides support and gives the structural framework to the body, it acts as a protective cover for internal organs such as the heart, brain and lungs, it provides sites of attachment for muscles, it stores minerals such as calcium and phosphate and it contains cavities where bone marrow produces blood cells. Bone is made up of two main components, cells and the bone matrix. There are four different types of cells in the bone; osteogenic, osteocytes, osteoblasts and osteoclasts of which…
8. What bones are fractures most likely to occur? (due to to low bone density/osteoporosis)…
Minerals such as calcium and phosphorus are stored in the bones. If the blood levels of these minerals drops excessively then some of the stores within the bone can be released. Fat can also be stored in the bones.…
5a. With ageing, bone mass decreases. This is espeically true of women following menopuase. Estrogen acts as a protector of bone by inhibiting the activity of osteoclasts. Once estrogen levels drop, after menopause, osteoclast activity increases.…
There are on average 206 individual bones in an adult human skeleton, which are both metabolically active and highly vascularised. Bones have many important roles within the human body, for example they provide structure and support for the fleshy tissue, protection of vital organs eg the brain in the cranial cavity, storage for vital materials eg calcium and phosphorus and also enables movement of the body as the bones provide a surface for ligament, muscles and tendons to attach to. The bones also play a role in blood production of both white and red blood cells as bone marrow is stored in the central cavity of long bones. The 206 individual bones can be divided in to 5 subgroups of bone, these are;…
The skeletal system can suffer from a few diseases one of the most common ones is Osteoporosis another one is Osteogenesis imperfecta. Osteoporosis affects in a progressive way that deteriorates bone mass. Making the bones weaker lacking density and causing to have the deficiency on the bones protein intake this can bring about to the one who has it more vulnerable to skeletal fractures. Osteogenesis imperfecta disturbs the connective tissue or the ability of building it making the bones brittle in way more defenseless to wounds. Both this conditions are critical and need to be treated on the notion of knowing one suffers from them.…
In childhood, bones grow and repair very quickly, but this process slows as you get older. Bones stop growing in length between the ages of 16 and 18, but continue to increase in density until you are in your late 20s. From about the age of 35, you gradually lose bone density. This is a normal part of ageing, but for some people it can lead to osteoporosis and an increased risk of fractures.…
Osteoporosis is a bone disease that can get worse with time. Your bones become fragile due to losing bone mineral density and bone mass. People do not realize this disease is occurring because they cannot feel their bones becoming weaker ("What is osteoporosis," 2011). Osteoporosis is most likely caused by three imbalances in the human body. Cause number one is a low magnesium/high calcium ratio. Cause number two is your female/male hormone is low. Cause number three is a low thyroid function ("The causes of osteoporosis,").…
Osteoporosis is a disease that is described by low bone mass and loss of bone tissue basically thinning of the bones that lead to weak and fragile bones. Bones are always in a state of changing where new bone tissues are replacing the old bone tissue in order to keep the strength. It affects men and women but it is usually a disease that affects mostly women. However when someone is diagnosed with osteoporosis it means that the bone tissue and mass is not replaced as fast with new bone tissue which is one factor of osteoporosis. Another factor that causes osteoporosis is a deficiency in estrogen which typically occurs in menopause causing low bone density because of the drop of estrogen. The probable effects on an everyday life of an 84- year old thin white female maybe critical. Since the bones become so thin and have low bone density, a minor fall can cause a fracture.…
