day 3 body systems

Scientists studying illnesses caused by chemically contaminated food conduct research to minimize the effects of these diseases on society. These chemicals harm the body through interactions between the digestive system and the immune system. Scientists conducting this research are likely to describe which of these interactions between the digestive and immune systems?

• F Chemicals enter the immune system through a break in the skin. The chemical contamination is then passed to the digestive system by the circulatory system.

• G The immune system transforms the chemicals in the contaminated foods into harmless chemicals. These harmless chemicals are then broken down by the digestive system .

• H When contaminated foods are eaten, the immune system prevents the chemicals from entering the digestive system.

• J Chemicals enter the digestive system through contaminated foods. Once in the body, the chemical contaminants impair the body's ability to fight off infectious diseases.

Coradas garrulus is a blue bird with an orange-brown back. The offspring of this bird have an effective defense mechanism. The young birds vomit and cover themselves in a foul-smelling orange liquid when they sense a threat by predators. Which two systems alert the young bird

to the danger and help produce the vomit it uses as a defense?

• A Nervous and digestive systems

• B Integumentary and muscular systems

• C Immune and respiratory systems

• D Excretory and reproductive systems

The human digestive system is approximately 900 cm long. Food is moved through the digestive tract primarily by -

• F bile produced by the pancreas

• G the enzymes amylase and pepsin

• H muscular contractions

• J hydrochloric acid in the stomach