Human Body

The Human Body

The human body is made up of a head, neck, torso, two arms and two legs.  The average height of an adult human is about 5 to 6 feet tall.  The human body is made to stand erect, walk on two feet, use the arms to carry and lift, and has opposoble thumbs (able to grasp).

The adult body is made up of:
100 trillion cells
206 bones
600 muscles
22 internal organs

There are many systems in the human body:
Circulatory System (heart, blood, vessels)
Respiratory System (nose, trachea, lungs)
Immune System (many types of protein, cells, organs, tissues)
Skeletal System (bones)
Excretory System (lungs, large intestine, kidneys)
Urinary System (bladder, kidneys)
Muscular System (muscles)
Endocrine System (glands)
Digestive System (mouth, esophogus, stomach, intestines)
Nervous System (brain, spinal cord, nerves)
Reproductive System (male and female reproductive organs)

The Cardiovascular
The cardiovascular system includes the heart and the blood vessels, and the respiratory system contains those organs which are responsible for carrying oxygen from the air to the blood stream and expelling the waste product of carbon dioxide. Blood circulates throughout our bodies in veins and arteries. The heart pumps oxygen into the blood and collects carbon dioxide from it to be expelled through the lungs. We usually think of respiration as the process of the lungs after air is breathed in through the mouth or nose. The lungs do play a very important role, but every living cell in the body is involved in this process. Respiration is the act of burning energy from oxygen. Breathing is an obvious part of the respiratory passages, but these also involve yawning, sneezing, coughing, hiccups, the power of speech, and the sense of smell. The respiratory flow has been “kidnapped” by the larynx, or voice box, which uses it to create a multiple range of sounds so that humans can communicate vocally. These systems’ tasks include organs which take up space in the face and neck and most of the chest. The cardiovascular and respiratory systems are basic to life and breathing, like the beat of one’s heart, is an automatic function which is controlled by the brain.