a. Marrow is a type of tissue found inside many animal bones, including our own. And the overall effect Fibroblasts produce collagen fibers that connect the broken bone ends, while osteoblasts start to form spongy bone. Youll learn more about bone marrow and other tissues that make up bones when you read this concept. Finally as you say having hollow bones would be lighter than having spongey bone however there needs to be a compromise to provide enough structural integrity without being too heavy, which combining a spongy flexible interior and hard tough exterior provides (think of a knights armour chain mail covered in steel plate armour). Red marrow fills the spaces in the spongy bone. Short bones are roughly cube-shaped and have only a thin layer of cortical bone surrounding a spongy bone interior. In general, their size and shape is an indication of the forces exerted through the attachment to the bone. Compact bone forms the hard outer layer of bone while spongy bone forms the porous interior. There are three general classes of bone markings: (1) articulations, (2) projections, and (3) holes. Reviewer: Tendons and ligaments attach to bones at the periosteum. There are three general classes of bone markings: (1) articulations, (2) projections, and (3) holes. If you look at compact bone under the microscope, you will observe a highly organized arrangement of concentric circles that look like tree trunks. This cell produces the boney matrix, releasing it outside of the cell. Direct link to Joanne's post The osteocyte, when immat, Posted 7 years ago. The epiphyses of bones, such as the neck of the femur, are subject to stress from many directions. 2. are separated by _?_. a. Cartilage cells hypertrophy and release substances A) Serves as model for bone formation B) Provides passageway for blood vessels c. Blood vessels, dragging osteoblasts and marrow Figure 6.3.1 - Anatomy of a Long Bone: A typical long bone showing gross anatomical features. To examine this finding further, recent research has compared the trabecular density of modern human skeletons to those of chimpanzees and early humans who lived millions of years ago. (a) chondroblasts stop dividing mitotically This section will examine the gross anatomy of bone first and then move on to its histology. If the articular cartilage at the end of one of your long bones were to degenerate, what symptoms do you think you would experience? A hollow medullary cavity filled with yellow marrow runs the length of the diaphysis of a long bone. (A) Marrow Which of the following statements about bone is not true ? The arteries enter through the nutrient foramen (plural = foramina), small openings in the diaphysis (Figure 6.3.10). Like osteoblasts, osteocytes lack mitotic activity. The trabeculae may appear to be a random network, but each trabecula forms along lines of stress to direct forces out to the more solid compact bone providingstrength to the bone. (A) shoulder They differentiate and develop into osteoblasts. Spongy bone contains red bone marrow that is used in erythropoiesis. Evolutionary Changes in Human Spongy Bone. As the name implies, an articulation is where two bone surfaces come together (articulus = joint). The answer is still unknown, but hereditary factors seem to play a role. Last reviewed: November 10, 2022 Kenhub. central haversian canal to these empty spaces Direct link to SofiyaMarkova's post for anything that classif, Posted 7 years ago. Spongy bone consists of plates ( trabeculae) and bars of bone adjacent to small, irregular cavities that contain red bone marrow. Spongy bone, also known as cancellous bone, is composed of a lattice-like arrangement of osteocytes known as trabeculae. Locomotion and Support Systems Quiz.pdf - 12/4/2018
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