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@SmartDoctor1 ===================== Muscles and bones What are bones, muscles and joints? Bones, muscles and joints make up the musculoskeletal system, along with cartilage, tendons, ligaments and connective tissue. This system gives your body its structure and support and lets you move around. The parts of the musculoskeletal system grow and change throughout life. Adult bodies have 206 bones and more than 600 muscles, connected by ligaments, tendons and soft tissues. The human skeleton of an adult consists of around 206 bones, depending on the counting of sternum (which may alternatively be included as the manubrium, body of sternum, and the xiphoid process). It is composed of 270 bones at the time of birth, but later decreases to 206: 80 bones in the axial skeleton and 126 bones in the appendicular skeleton. Many small accessory bones, such as sesamoid bones, are not included in this count. Skeletal muscles (commonly referred to as muscles) are organs of the vertebrate muscular system and typically are attached by tendons to bones of a skeleton. The muscle cells of skeletal muscles are much longer than in the other types of muscle tissue, and are often known as muscle fibers. The muscle tissue of a skeletal muscle is striated – having a striped appearance due to the arrangement of the sarcomeres. Skeletal muscles are voluntary muscles under the control of the somatic nervous system. The other types of muscle are cardiac muscle which is also striated and smooth muscle which is non-striated; both of these types of muscle tissue are classified as involuntary, or, under the control of the autonomic nervous system. A skeletal muscle contains multiple fascicles – bundles of muscle fibers. Each individual fiber, and each muscle is surrounded by a type of connective tissue layer of fascia. Muscle fibers are formed from the fusion of developmental myoblasts in a process known as myogenesis resulting in long multinucleated cells. In these cells the nuclei, termed myonuclei, are located along the inside of the cell membrane. Muscle fibers also have multiple mitochondria to meet energy needs. ===================== Follow us on the @SmartDoctor1 digital platform ===================== ▶Facebook▶ ▶Instagram▶ ▶TikTok▶ @ ▶ Second Channel▶ @SmartZoologist ============= Smart Doctor 👨⚕️ @SmartDoctor1/youtube All rights reserved © 2023 ============= #bones #muscles #jointpain #brain #shorts #viral #the_voice #thevoice #voice #voiceover #SmartDoctor1 #smartdoctor #Smart_Doctor #oxygen #blood #body #pregnancy #medicina #anatomy #doctor #america #माहवारी #月経 #임신 #妊娠 #pregnant #gravidez #information #pronunciation #speak #speech #read
