MUSCULAR SYSTEM

-

Muscular System Outline:

ComponentsMuscles: Muscles are special type of tissues of human body that posess the ability of contraction and relaxation. They can contract actively thus producing force for different body movements.
Types of Muscle
Skeletal MuscleStriated, under voluntary control, found attached to skeleton, produce major movements of body parts
Smooth MuscleNon striated, not under voluntary control, found in soft organs of body, responsible for processes like digestion of food etc.
Cardiac MuscleStriated, involuntary, present exclusively in heart, responsible for pumping activit of heart, very strong and tough
FunctionsMovements of body parts, Stability and Posture, Heat production, Circulation, Help in Digestion

Introduction to Muscular System:

Muscular System
Imagen relacionada
Muscular system is the system of Human Body that provides motor power for all movements of body parts. Muscular system is composed of special tissue called muscular tissue. Muscles have the ability to contract actvely to provide the force for movements of body parts. Muscular system is an important system of human body because without it, life will completely stop. Muscles produce not only those movements that are under the control of our will and that we can see and feel, but also those movements that are responsible for activities like breathing, digestion of food, pumping of blood etc.

Muscles:

Muscles are body tissues that provide the force for all body movements. They are made of special types of cells. For details of structure and types of muscles, please see the basic anatomy article “”. For details of microscopic structure of muscles, pleas see the histology article “”.

Types of muscles:


Functions of the Muscular System:

Muscular system has the following important functions in human body;
  1. MOVEMENTS OF BODY PARTS: Skeletal muscles are responsible for all voluntary movements of human body parts. They provide the force by contracting actively at the expense of energy. In other words, muscles are motors of body where chemical energy of food is converted into mechanical work.
  2. STABILITY AND POSTURE: Skeletal muscles stabilize human skeleton and give a proper posture to human beings. Some joints of human body are weak and they require the support of muscular system to achieve stability. Skeletal muscles are very important for such joints.
  3. HEAT PRODUCTION: A large share of body’s energy is used by muscular system. As a result of high metabolic rate, muscles produce great amount of heat in the body. Heat produced by muscles is very important in cold climates.
  4. CIRCULATION: Cardiac muscles provide the main force for circulation of blood throughout human body. The regular pumping of heat keeps the blood in motion and nutrients are readily available to every tissue of human body.
  5. HELP IN DIGESTION: Smooth muscles of organs like stomach and intestine help the digestive system in the process of digestion of food.

Comentarios

Publicar un comentario

Entradas populares de este blog

HUMAN EMBRYOGENESIS (STEP 1-4)

-
Imagen
Embryogenesis, the first eight weeks of development after fertilization, is an incredibly complicated process. It’s amazing that in eight weeks we’re transforming from a single cell to an organism with a multi-level body plan. The circulatory, excretory, and neurologic systems all begin to develop during this stage. Luckily, like with many complex biological concepts, fertilization can be broken down into smaller, simpler ideas. The big idea of embryogenesis is going from a single cell to a ball of cells to a set of tubes.  Starting from the very beginning Step 1 : a  zygote  is the single cell formed when an egg and a sperm cell fuse; the fusion is known as fertilization Step 2 : the first 12-to 24-hours after a zygote is formed are spent in  cleavage  – very rapid cell division The zygote’s first priority is dividing to make lots of new cells, so it’s first few days are spent in rapid mitotic division. With each round of division, it doubles in c...
Leer más

CENTRAL NERVOUS SYSTEM

-
Imagen
The Central Nervous System (CNS) The central nervous system is divided into two major parts: the brain and the spinal cord.   Firstly,we are going to talk about the brain. Parts of the Human Brain and their Subdivisions Human encephalon resembles, in structure and function, with that of the other vertebrates. The scientists reveal that parts of the human brain are Forebrain, Midbrain & Hindbrain and the related structures that collectively act as a single highly specialized unit. These parts work in coordination and perform  different functions of brain . More specifically, it is divided into five major regions, namely, telencephalon, diencephalon or inter-brain, myelencephalon (hindbrain/medulla oblongata), metencephalon and mesencephalon (midbrain). Here follows a precise but comprehensive description of each of the above given divisions. Telencephalon/Cerebrum—Anterior Part Of Forebrain Further composed of cerebral cortex, limbic and basal ganglia,...
Leer más

ANATOMY OF THE KNEE

-
Imagen
The knee is one of the largest and most complex joints in the body. The knee joins the thigh bone (femur) to the shin bone (tibia). The smaller bone that runs alongside the tibia (fibula) and the kneecap (patella) are the other bones that make the knee joint. Tendons connect the knee bones to the leg muscles that move the knee joint. Ligaments join the knee bones and provide stability to the knee: The anterior cruciate ligament prevents the femur from sliding backward on the tibia (or the tibia sliding forward on the femur). The posterior cruciate ligament prevents the femur from sliding forward on the tibia (or the tibia from sliding backward on the femur). The medial and lateral collateral ligaments prevent the femur from sliding side to side. Two C-shaped pieces of cartilage called the medial and lateral menisci act as shock absorbers between the femur and tibia. Numerous bursae, or fluid-filled sacs, help the knee move smoothly.
Leer más

SKELETAL SYSTEM (TYPES OF BONES AND PARTS)

-
Imagen
The skeletal system includes all of the bones and joints in the body. Each bone is a complex living organ that is made up of many cells, protein fibers, and minerals. The skeleton acts as a scaffold by providing support and protection for the soft tissues that make up the rest of the body. The skeletal system also provides attachment points for muscles to allow movements at the joints. New blood cells are produced by the red bone marrow inside of our bones. Bones act as the body’s warehouse for  calcium, iron, and energy in the form of fat. Finally, the skeleton grows throughout childhood and provides a framework for the rest of the body to grow along with it. Skeletal System Anatomy The skeletal system in an adult body is made up of 206 individual bones. These bones are arranged into two major divisions: the  axial skeleton  and the  appendicular skeleton .   Types of Bones All of the bones of the body can be broken down into five types: long, sho...
Leer más