The curvature of the lens of the eye changes when we look at a distant or at a near object, to ensure a sharp image.
Concave and convex lenses are commonly used for the correction of short-sightedness and long-sightedness.
T lymphocytes participate in the cellular immune response, eliminating antigens in cells. Let's see their types.
Muscle contractions can be dynamic, causing joint movement, or static, producing force without movement.
Ankylosing spondylitis is an inflammatory condition belonging to the spondyloarthritides group and is primarily associated with axial involvement. The disease mainly causes inflammation of the entheses (the points where ligaments and tendons attach to bone), but many other organ systems may also be affected.
This animation demonstrates the fine molecular structure and mechanism of muscles.
The reflex triggered by the stretching of the thigh extensor muscle is the patellar reflex.
Bone remodelling occurs in response to load changes, a process during which the structure of bones is adjusted constantly and dynamically.
Bone repair occurs through direct intramembranous healing or indirect healing with endochondral ossification.