Which layer of hyaline cartilage allows the diaphysis to grow in length?
General anatomy |skeletal system|bd chaurasia handbook
Osseous tissue (bone tissue) is unlike any other tissue in the body. Bone is a hard substance, and many of its functions are dependent on it. Bone is versatile in the sense that its form changes to accommodate stresses, as we’ll see later in this chapter. This section will first look at the gross anatomy of bone before moving on to its histology.
A long bone’s structure allows for the best visualization of all of a bone’s components ((Figure)). The diaphysis and epiphysis are the two pieces of a long bone. The diaphysis is the tubular shaft of the bone that connects the proximal and distal ends. The medullary cavity is a hollow area in the diaphysis that is filled with yellow marrow. The diaphysis walls are made up of thick, rigid, compact bone.
The epiphysis (plural = epiphyses) is the larger area of the bone at either end that is filled with spongy bone. The spongy bone’s gaps are filled with red marrow. At the metaphysis, where each epiphysis reaches the diaphysis, the epiphyseal plate (growth plate), a layer of hyaline (transparent) cartilage in a developing bone, is found. The cartilage is replaced by osseous tissue and the epiphyseal plate becomes an epiphyseal line when the bone begins developing in early adulthood (around 18–21 years).
Anatomy and physiology – development of bone
Help (structural structure for body, supports soft tissues, and provides attachment for tendons of most skeletal muscles), defense, assistance in movement, mineral homeostasis, blood cell development, and triglyceride storage all become more important as one gets older.
Where the bone is not covered by articular cartilage, it is surrounded by a dense irregular connective tissue. While allowing the brown to expand in diameter, it protects, nourishes, aids in fracture repair, and serves as attachment points for ligaments and tendons.
These are mesenchyme-derived advanced stem cells. They are the only cells that divide, resulting in daughters that turn into osteoblasts. Found in the inner portion of the periosteum, endosteum, and blood vessel canals within bone.
Cells formed from osteoblasts that have been entrapped in matrix secretions and no longer secrete them. They are the primary cells in bone tissue that carry out daily cellular functions.
It has a small amount of space between its hard components. Osteon (Haversian) systems are used to organize the data. Along with the calcified matrix, it includes blood and lymph vessels, nerves, and osteocytes. Along stress lines, osteons are oriented in the same direction.
Bone elongation – processes at the epiphyseal plate
What makes up the periosteum? 1.the outer fibrous layer of dense irregular connective tissue; 2.the inner osteogenic layer of cells; some cells in the periosteum allow bone to expand in thickness but not in length.
Bone tissue that is compact It is the stongest type of bone tissue, with few spaces; it makes up about 80% of the skeleton; it is located underneath the periosteum of all bones and makes up the majority of the diaphyses of long bones.
What is the function of the complex, microscopic system of interconnected canals found in bone? Throughout the bone, the canaliculi bind lacunse to one another and to the central canals.
What are the two main distinctions between spongy and compact bones? 1.Spongy bone tissue is light, decreasing total bone weight and allowing it to move more quickly when pulled by skeletal muscle; 2.spongy bone trabeculae help and protect the red bone marrow.
Some central (haversian) canals may become blocked as people age. What effect would this have on the osteocytes in the area? Since the central (haversian) canals are the main blood supply to an osteon’s osteocytes (haversian system), their blockage will result in osteocyte death.
8. skeletal system [bones] || مقدمة عن علم التشريح – سنة أولى
The terms osteogenesis and ossification are sometimes used interchangeably to describe the development of bones. During the first few weeks after childbirth, the skeleton begins to develop. The skeletal pattern is established in cartilage and connective tissue membranes by the end of the eighth week after conception, and ossification starts.
Adults’ bones continue to evolve throughout their lives. Also after reaching adult stature, bone formation continues for fracture repair and remodeling to accommodate changing lifestyles. The three cell types involved in the formation, growth, and remodeling of bones are osteoblasts, osteocytes, and osteoclasts. Bone forming cells are osteoblasts, mature bone cells are osteocytes, and osteoclasts break down and reabsorb bone.
The replacement of sheet-like connective tissue membranes with bony tissue is known as intraamembranous ossification. Intramembranous bones are those that are shaped in this way. They contain some of the irregular bones as well as some of the smooth bones of the skull. Connective tissue membranes form the foundation for potential bones. Osteoblasts migrate to membranes and deposit bony matrix all over them. Osteocytes are produced when osteoblasts are surrounded by matrix.