Solid waste is stored in the colon until it is expelled from the body. This demonstrates that the excretory system working with which of the following systems?

• circulatory

• digestive

• respiratory

• muscular

The digestive process begins as food is chewed in the mouth. The chewing of food is primarily conducted by the –

• immune system

• lymphatic system

• muscular system

• respiratory system

Carbon dioxide is a gaseous waste that exits the body when you exhale. This demonstrates the respiratory system working with which of the following systems?

• muscular

• immune

• nervous

• excretory

Food molecules diffuse through the wall of the intestines directly into the blood. Which two systems directly interact during this process?

• respiratory and circulatory

• circulatory and muscular

• immune and digestive

• digestive and circulatory

Blood cells, which are part of the circulatory system, or created by marrow. This demonstrates that the circulatory system interacts with which of the following systems?

• respiratory

• skeletal

• excretory

• integumentary

Oxygen is absorbed by the lungs and diffuses directly into the bloodstream. Which two systems directly interact during this process?

• muscular and skeletal

• muscular and circulatory

• circulatory and respiratory

• respiratory and excretory

Contractions push the food along the gastrointestinal tract. Which two systems directly interact during this process?

• muscular and digestive

• skeletal and muscular

• muscular and circulatory

• digestive and excretory

The heart is considered to be a part of which of the two systems listed below?

• circulatory and integumentary

• respiratory and muscular

• circulatory and muscular

• skeletal and circulatory

White blood cells are a part of the body’s defense against infections. Based on importance of these blood cells, which two systems are involved with fighting infections?

• muscular and circulatory

• circulatory and immune

• immune and digestive

• excretory and circulatory

Which of the following levels of organization would accurately fill the gap in the diagram above?

• cell

• molecule

• organ system

• population