Nervous System

Topics: Nervous system, Heart, Blood Pages: 4 (1244 words) Published: April 12, 2014
BIO110-1401A-02 The Human Body and Wellness
Phase 1 Individual Project
Tammette Helms

Nervous System

The nervous system is a complex collection of nerves and specialized cells known as neurons that transmit signals between different parts of the body. Animals with backbones and spinal columns have a central and a peripheral nervous system. The central nervous system is made up of the brain, spinal cord and retina. The peripheral nervous system consists of sensory neurons, ganglia and nerves that connect to one another and to the central nervous system. (

The nervous system sends a message to the brain when a hand touches a hot stove eye or gets too close to a fire. The message goes to the brain saying this is too hot pull back your hand. In doing so the brain sends neurons through the muscles and in reaction the hand is pulled back out of harm’s way.

Skeletal System

The skeletal system includes all the bones of the body, cartilage, tendons and ligaments. This system helps in providing the framework of the body and in movement. The skeleton is divided into two parts: axial: skull, vertebrae, ribs, and the sternum, appendicular: bones of the upper extremities including the shoulder girdle and bones of the lower extremities including the pelvic girdle. ( )

The skeletal system helps one to walk, run, and move, as well as protect the vital organs of the body on a daily basis. The tendons and cartilage in the fingers of one’s hand extend and bend to allow grasping, holding, writing, typing, etc.

Muscular System

The muscular system is responsible for the movement of the human body. Attached to the bones of the skeletal system are about 700 named muscles that make up roughly half of a person’s body weight. Each of these muscles is a discrete organ constructed of skeletal muscle tissue, blood vessels,...

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