Large doses of TBT cause damage to the reproductive and central nervous systems, bone structure, and the liver bile duct of mammals. TBT compounds can also damage the immune system." ... coasts show accumulations of tributyltin, an ingredient in marine paint that may have suppressed the animals' immune systems." ... By binding to a cell's hormone receptor, it modifies the functioning and genetic mechanism of the cell, causing a wide range of effects, from cancer to reduced immunity to nervous system disorders to miscarriages and birth deformity." ...

• Word Count: 1422
• Approx Pages: 6
• Grade Level: High School

Introduction The respiratory system is essential to life as the body's provider of oxygen. ... The respiratory system also allows for the excretion of carbon dioxide. The respiratory system is usually considered to comprise: airways (nose, mouth, pharynx, larynx, trachea, bronchi, and bronchioles); an area of gas exchange (alveoli); and the necessary structures to drive and control respiration (ribs, intercostals muscles, diaphragm, pleura and nervous system). ... The other components of the respiratory tract, respiratory muscles, nervous system, ribs, etc, while not primarily inv...

• Word Count: 3614
• Approx Pages: 14
• Grade Level: Undergraduate