Structural and Functional Classification of Joints: Joints, also known as articulations, are the places where two or more bones meet. They are essential components of the skeletal system because they provide flexibility, stability, and movement to the body. Without joints, the skeleton would be a rigid framework, making body movements impossible. Joints not only connect…
What is Neuromuscular Junction: The neuromuscular junction (NMJ) is a specialized synapse or communication site between a motor neuron and a skeletal muscle fiber. It is the point where the nervous system transmits signals to skeletal muscles, initiating muscle contraction. The neuromuscular junction plays a vital role in voluntary movements such as walking, running, writing,…
Physiology of Muscle Contraction:: Muscle contraction is a physiological process in which skeletal muscle fibers generate force and shorten to produce movement. This process allows the body to perform voluntary activities such as walking, running, lifting objects, writing, and maintaining posture. Muscle contraction occurs through a highly coordinated interaction between the nervous system, muscle fibers,…
Organization of Skeletal Muscle: Skeletal muscle is a specialized type of muscle tissue that is attached to bones and is responsible for voluntary body movements. It is called skeletal muscle because it is connected to the skeleton through tendons and works under conscious control. Skeletal muscles make up about 40–50% of the total body weight…
Salient Features and Functions of Bones: The human skeletal system is divided into two major parts: the axial skeletal system and the appendicular skeletal system. Together, these two divisions form the body’s framework, providing support, protection, movement, and stability. Although both systems are made of bones, they differ in their location, structure, and functions. The…
Types of Bones: Bones are the hard, living organs that make up the skeletal system. They provide shape and support to the body, protect internal organs, store minerals such as calcium and phosphorus, and help in the production of blood cells inside the bone marrow. Although all bones perform similar basic functions, they differ in…
Skeletal System and Joints: The skeletal system is the framework of the human body. It is made up of bones, cartilage, ligaments, and joints that work together to support the body, protect internal organs, and help in movement. An adult human has 206 bones, while a newborn baby has around 270 bones. As a child…
Basic Principles of Wound Healing: Wound healing is a complex, highly coordinated biological process through which the body repairs damaged tissues and restores the integrity of the skin or other injured structures after trauma, surgery, burns, infections, or disease. The skin acts as the body’s primary protective barrier against physical injury, microorganisms, harmful chemicals, and…
Leprosy, also known as Hansen’s disease, is a chronic infectious disease caused primarily by Mycobacterium leprae and, less commonly, by Mycobacterium lepromatosis. It mainly affects the skin, peripheral nerves, mucous membranes of the upper respiratory tract, and eyes. Unlike many bacterial infections, leprosy progresses very slowly, often taking 2 to 20 years or even longer…
What is Dermatitis: Dermatitis is a broad term used to describe inflammation of the skin, resulting in symptoms such as redness, swelling, itching, pain, dryness, scaling, and sometimes blister formation. It is one of the most common dermatological conditions encountered in clinical practice and can affect individuals of all ages, from infants to the elderly….