which is not correct about spongy bone?

Question: QUESTION 9 Which of the following statement (s) is NOT TRUE about spongy bone? The cellular layer is adjacent to the cortical bone and is covered by an outer fibrous layer of dense irregular connective tissue (see Figure 6.3.4a). As its name suggests, spongy bone is porous like a sponge, containing an irregular network of spaces. J Mater Sci Mater Med. Each group of concentric circles (each tree) makes up the microscopic structural unit of compact bone called an osteon (this is also called aHaversian system). 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. Its roasted bone marrow, still inside the bones. is just this porous network of spikes surrounding Cancellous bone makes up about 20 percent of the human skeleton, providing structural support and flexibility without the weight of compact bone. Osteogenic cells are undifferentiated and develop into osteoblasts. The Cardiovascular System: Blood Vessels and Circulation, Chapter 21. The answer lies in the properties of a third category of bone cellsthe osteogenic (osteoprogenitor) cell. a. D) Blood-forming tissue is found in the skull and pelvic bones only. Compare and contrast yellow bone marrow and red bone marrow. It also makes up about 20% of a human skeleton. 2. The hollow region in the diaphysis is called themedullary cavity, which is filled with yellow marrow. The combination of flexible collagen and hard mineral crystals makes bone tissue hard without making it brittle. Imagine laying a heavy-framed picture flat on the floor. Our engaging videos, interactive quizzes, in-depth articles and HD atlas are here to get you top results faster. The osteoblast is the bone cell responsible for forming new bone and is found in the growing portions of bone, including theendosteum and the cellular layer of the periosteum. Anatomy & Physiology by Lindsay M. Biga, Staci Bronson, Sierra Dawson, Amy Harwell, Robin Hopkins, Joel Kaufmann, Mike LeMaster, Philip Matern, Katie Morrison-Graham, Kristen Oja, Devon Quick & Jon Runyeon is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License, except where otherwise noted. Now let's take a piece of So let's talk more about The osteocytes are located inside spaces called lacunae (singular = lacuna), found at the borders of adjacent lamellae. Biologydictionary.net, May 07, 2017. https://biologydictionary.net/spongy-bone/. The vessels and nerves of spongy bone travel through the spaces between trabeculae and do not need separate passageways. Compact bone, it's no Located in the spaces, between the trabeculae of some spongy bones is red bone marrow. Short bones are roughly cube-shaped and have only a thin layer of cortical bone surrounding a spongy bone interior. Growth plate-contributes to increase in bone length b. When occurring in the skull, Pagets disease can cause headaches and hearing loss. The compact bone is the main structure in the body for support, protection, and movement. correct ? The medullary cavity has a delicate membranous lining called theendosteum(end = inside; oste = bone), where bone growth, repair, and remodeling occur. Like compact bone, spongy bone, also known as cancellous bone, contains osteocytes housed in lacunae, but they are not arranged in concentric circles. It presents (possesses) osteons b. A projection is an area of a bone that projects above the surface of the bone. Instead, the lacunae and osteocytes are found in a lattice-like network of matrix spikes called trabeculae (singular = trabecula) ( [link] ). Spongy bone is home to the bone marrow and hematopoietic stem cells that differentiate into red blood cells, white blood cells and platelets. (B) Knee joint The diaphysis is the tubular shaft that runs between the proximal and distal ends of the bone. The outer walls of the diaphysis (cortex, cortical bone) are composed of dense and hard compact bone, a form of osseous tissue. matrix (d) all of these (e) none of these, Periosteum: (a) is an anchoring site for tendons and Running down the center of each osteon is thecentral canal, or Haversian canal, which contains blood vessels, nerves, and lymphatic vessels. Osteoblasts replace calcifies cartilage with early sponge bone what is the trabeculae of a spongy bone made of? Their shapes and their functions are related such that each categorical shape of bone has a distinct function. The periosteum covers the entire outer surface except where the epiphyses meet other bones to form joints (Figure 6.3.2). Diagram of Spongy Bone. 1. Spongy bone has a greater surface area than cortical bone but makes up only 20 percent of bone mass. The shaft of a long bone is also called the: (a) proximal, The marrow space in the shaft of a long bone is called the. Where do osteoblasts and osteocytes come from, and how are they related to each other? Excellent stuff bones! Compare and contrast the two main types of osseous tissue. Tendons and ligaments attach to bones at the periosteum. The bone cells located in the trabecular matrix of spongy bone are called _______________. The endosteum also lines each central canal, allowing osteons to be removed, remodeled and rebuilt over time. It is also found inside the vertebrae, in the ribs, in the skull and in the bones of the joints. The hydroxyapatite crystals give bones their hardness and strength, while the collagen fibers give them flexibility so that they are not brittle. Red bone marrow is commonly found in spongy bone within adults The majority of bones development from a cartilage template through a process called endochrondal ossification The osteoblasts help break down the extracellular matrix of bone tissue Compact bone is organized in structures called osteons Previous question Next question replacing cartilage. (D) Pivot Joint, Saddle joints are located Their shapes are irregular and complicated. In these studies, a dye containing a radioactive ion is injected into the body. Bone scans are also useful. Instead, the lacunae and osteocytes are found in a lattice-like network of matrix spikes called trabeculae (singular = trabecula) ( Figure 6.13 ). B. Direct link to xxscientificnerdxx's post It's made up of CaCo3, os, Posted 7 years ago. Direct link to jessica paoletti's post Is this true for all bone, Posted 4 years ago. The osteoblasts try to compensate but the new bone they lay down is weak and brittle and therefore prone to fracture. The arteries enter through thenutrient foramen(plural = foramina), small openings in the diaphysis (Figure9). Why? compact bone ? (a) short. (A) It is less dense than compact bone (B) it is organized into structures that resembles a bridge's supporting girders (C) it is soft and spongy (D) it adds strength to bone without adding mass c What is the skeleton of a newborn baby mainly composed of? Some bone spicules may also appear at this point. long cellular processes that branch through the canaliculi to contact other osteocytes These multinucleated cells originate from monocytes and macrophages, two types of white blood cells, not from osteogenic cells. Direct link to Isha Ingole's post what are cartilage bones , Posted 4 years ago. Find reliable sources to answer the following questions: Watch this entertaining and fast-paced Crash Course video to further explore bone structure: Check out this video to learn more about bone remodeling: This page titled 14.4: Structure of Bone is shared under a CK-12 license and was authored, remixed, and/or curated by Suzanne Wakim & Mandeep Grewal via source content that was edited to the style and standards of the LibreTexts platform; a detailed edit history is available upon request. These salt crystals form when calcium phosphate and calcium carbonate combine to create hydroxyapatite, which incorporates other inorganic salts like magnesium hydroxide, fluoride, and sulfate as it crystallizes, or calcifies, on the collagen fibers. Osteocytes positioned close to a blood vessels can take on nutrients and expel waste products through tiny interconnecting channels on the surface of the trabeculae called canaliculi. From the ATP yield of palmitate oxidation, what is the metabolic efficiency of the biological oxidation, in terms of kilojoules saved as ATP per kilojoule released? Classifications of Bones Direct link to Adijat Akinsanya's post How are the Volkmann rel. in fact, because of all these various trabeculae or cavities, the surface area of Spongy bone is also present in the joints of the body and acts as a shock absorber when we walk, run and jump. Projections stick out from the surface of the bone and provide attachment points for tendons and ligaments. Four types of cells are found within bone tissue: osteoblasts, osteocytes, osteogenic cells, and osteoclasts (Figure 6.3.5). If the articular cartilage at the end of one of your long bones were to deteriorate, which is actually what happens in osteoarthritis, you would experience joint pain at the end of that bone and limitation of motion at that joint because there would be no cartilage to reduce friction between adjacent bones and there would be no cartilage to act as a shock absorber. "Difference between Spongy Bone and Compact Bone." Fluid, Electrolyte, and Acid-Base Balance, Lindsay M. Biga, Staci Bronson, Sierra Dawson, Amy Harwell, Robin Hopkins, Joel Kaufmann, Mike LeMaster, Philip Matern, Katie Morrison-Graham, Kristen Oja, Devon Quick & Jon Runyeon, https://commons.wikimedia.org/w/index.php?curid=20904735, Creative Commons Attribution-ShareAlike 4.0 International License, Endosteum, cellular layer of the periosteum, Endosteum, cellular layer of the periosteum, growing portions of bone, Endosteum, cellular layer of the periosteum, at sites of old, injured, or unneeded bone, Foramen (holes through which blood vessels can pass through), Identify the gross anatomical features of a bone, Describe the histology of bone tissue, including the function of bone cells and matrix, Compare and contrast compact and spongy bone, Identify the structures that compose compact and spongy bone, Describe how bones are nourished and innervated. for anything that classifies as a bone, yes. Marrow is a type of tissue found inside many animal bones, including our own. osteoblasts secrete osteoid tissue (d) calcium salts Periosteum and Endosteum. The periosteum contains blood vessels, nerves, and lymphatic vessels that nourish compact bone. It is denser than compact bone. (C) Hinge Joint (B) knee In osseous tissue which characteristics apply to spongy bone? Although bone cells compose less than 2%of the bone mass, they are crucial to the function of bones. 1. Spongy bone is important for a number of reasons. Table 1describes the bone markings, which are illustrated in (Figure4). Some scientists believe Pagets disease is due to an as-yet-unidentified virus. that if you take a look at spongy bone, that it looks pretty much a lot like a sponge and Which of the following statements is NOT true about spongy bone? Most bones of the limbs, including those of the fingers and toes, are long bones. In comparison, it makes sense that the skeleton of a chimpanzee is almost entirely composed of spongy bone. Bone scans are also useful. Firstly it is weaker but more flexible than cortical (compact) bone which it is very hard and strong but ridged (generally things that are ridged and hard do well under compression but not tension/flexure), so areas that come under flexure (eg ribs, ends of long bones) may benefit. The nerves sense pain, and it appears the nerves also play roles in regulating blood supplies and in bone growth, hence their concentrations in metabolically active sites of the bone. The osteocytes receive their nutrition from the central (Haversian) canal via little canals called canaliculi. - [Instructor] All right so Four types of cells are found within bone tissue. is the bone cell responsible for forming new bone and is found in the growing portions of bone, including the periosteum and endosteum. We also acknowledge previous National Science Foundation support under grant numbers 1246120, 1525057, and 1413739. (b) In this micrograph of the osteon, you can clearly see the concentric lamellae and central canals. In the center of these layers is a canal called the haversian cancellous or trabecular bone. fibrocartilage; withstand pressure and stretch elastic cartilage; withstand repetitive bending skeletal cartilage; reinforce airways hyaline cartilage; cover the ends of bones Answer C The pubic symphysis connects the two hip bones anteriorly and provides a little movement during childbirth. Which of the following is not associated with spongy bone that can become osteoblasts (b) is necessary for the repair word lacuna or lacunae, you should think empty space. A. The structure of a long bone allows for the best visualization of all of the parts of a bone (Figure 1). (a) short (b) flat. Later discussions in this chapter will show that bone is also dynamic in that its shape adjusts to accommodate stresses. Biology Dictionary. Areas of bone resorption have an affinity for the ion, so they will light up on the scan if the ions are absorbed. It is found in most areas of bone that are not subject to great mechanical stress. They can communicate with each other and receive nutrients via long cytoplasmic processes that extend throughcanaliculi(singular = canaliculus), channels within the bone matrix. If a bone marrow transplant is successful, the new bone marrow will start making healthy blood cells and improve the patients condition. Spongy bone, also known as cancellous bone or trabecular bone, is a very porous type of bone found in animals.

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