Articles: The Human Body
The Nervous System
The nervous system of an animal coordinates the activity of the muscles, monitors the organs, constructs and processes input from the senses and initiates actions.
In animals with brains, the nervous system also generates and conducts thoughts and emotions. … Read more
Median Nerve
The median nerve is a nerve that runs down the arm and forearm. It is one of the five main nerves originating from the brachial plexus.
The median nerve is formed from parts of the medial and lateral cords, and continues down the arm. … Read more
The Body
With regard to living things, a body is the integral physical material of an individual, and contrasts with soul, personality and behavior. In some contexts, a superficial element of a body, such as hair may be regarded as not a part of it, even while attached. … Read more
The Skeleton
The skeleton or skeletal system is the biological system providing support in living organisms. An internal skeletal system consists of rigid structures within the body, moved by the muscular system. If the structures are mineralized or ossified, as they are in humans and other mammals, they are referred to as bones. … Read more
Muscle Spindle
A muscle spindle is a specialized muscle structure innervated by both sensory and motor neuron axons. Its functions are to send proprioceptive information about the muscle to the central nervous system, and to respond to muscle stretching. … Read more
The Neck
The neck is the part of the body on many limbed vertebrates that distinguishes the head from the torso or trunk. An anatomical description of the human neck follows.
Anatomy of the (human) neck
In the middle line below the chin can be felt the body of the hyoid bone, just below which is the prominence of the thyroid cartilage called “Adam’s apple,” better marked in men than in women. … Read more
Ligaments and Tendons
Ligaments and tendons are forms of fibrous connective tissue.
A ligament is a short band of tough fibrous connective tissue composed mainly of long, stringy collagen molecules. Ligaments connect bones to other bones in joints. … Read more
Skeletal Muscle
Skeletal muscle is a type of striated muscle, attached to the skeleton. Skeletal muscles are used to facilitate movement, by applying force to bones and joints; via contraction. They generally contract voluntarily (via nerve stimulation), although they can contract involuntarily. … Read more
Immune System
The immune system of a multicellular organism has several functions. It acts primarily as a defense against foreign pathogens (such as viruses, bacteria, parasites), and some poisons. It also functions in the return of extracellular fluid to the blood, and the formation of white blood cells. … Read more
Bone
Bone is a connective tissue and organ, found in many animals. Bones are used to support body structures, protect internal organs, and (in conjunction with muscles) facilitate movement; they are also involved with cell formation, calcium metabolism, and mineral storage. … Read more