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פרק 20
מהי מערכת השלד?
The adult human skeleton comprises 206 bones that are connected through cartilage, tendons, and ligaments. The skeleton provides a rigid framework…
מבנה העצם
Within the skeletal system, the structure of a bone, or osseous tissue, can be exemplified in a long bone, like the femur, where there are two types…
מפרקים
Joints, also called articulations or articular surfaces, are points at which ligaments or other tissues connect adjacent bones. Joints permit…
עיצוב עצם מחדש
Bone remodeling is a continuous and balanced process of bone resorption by osteoclasts and bone formation by osteoblasts. In adults, it helps…
אנטומיית שריר שלד
Skeletal muscle is the most abundant type of muscle in the body. Tendons are the connective tissue that attaches skeletal muscle to bones. Skeletal…
סיווג סיבי שריר שלד
Skeletal muscles continuously produce ATP to provide the energy that enables muscle contractions. Skeletal muscle fibers can be categorized as type…
התכווצות שריר
  In skeletal muscles, acetylcholine is released by nerve terminals at the motor end plate—the point of synaptic communication between…
מחזור גשר-הצלבה
As muscle contracts, the overlap between the thin and thick filaments increases, decreasing the length of the sarcomere—the contractile unit of…
יחידות מנוע
A motor unit consists of two main components: a single efferent motor neuron (i.e., a neuron that carries impulses away from the central nervous…
עמוד השדרה
The spinal cord is the body’s major nerve tract of the central nervous system, communicating afferent sensory information from the periphery to…
תחושת כאב
Nociception—the ability to feel pain—is essential for an organism’s survival and overall well-being. Noxious stimuli such as…
נושא ספציפי דגם השלד והשרירים ללמוד עצם המתח במהלך תנועה דינאמית
Bone stress injuries are common in sports and military trainings. Repetitive large ground impact forces during training could be the cause. It is…
בניית מודלים אלמנטים סופיים לחקור ביומכניקה לסת דג הזברה
Skeletal morphogenesis occurs through tightly regulated cell behaviors during development; many cell types alter their behavior in response to…
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