Circulatory and Digestive Systems

Which statement BEST describes the purpose of the circulatory system?

• To supply oxygen and nutrients to the body via blood vessels
• To remove digestive waste
• To control all the movement in the body 
• To remove urine

_________________ travel away from the heart and carry oxygen-rich blood to the body.

• arteries
• veins

The circulatory system works directly with the ________ to exchange oxygen and carbon dioxide in the body.

• excretory 
• respiratory
• nervous
• endocrine

Which of these activities IS NOT related to the digestive system?

• absorbing nutrients into the bloodstream from the small intestine
• breaking down food particles into smaller particles
• moving solid waste through the body to get rid of it 
• delivering nutrients and oxygen to muscle cells

Which describes a task performed by the circulatory system?

• sending messages to the brain

• controlling muscle movement

• transporting waste materials

• producing energy from foods

Why is the digestive system important?

• It transports blood that cells need.

• It provides oxygen that cells need.

• It provides nutrients that cells need to produce energy.

• It carries carbon dioxide and oxygen away from the body.

Tags

NGSS.MS-LS1-3

NGSS.MS-LS1-7

Digestion begins _____

• in the mouth

• in the esophagus

• in the stomach

• in the liver

Chewing food is an example of

• chemical digestion

• mechanical digestion

A student wants to test the effects of different types of exercise on heart rate.  What is the dependent variable?

• heart rate
• type of exercise
• amount of exercise
• time of day exercise occurs

Experiment: How can adding cardiovascular exercise to one’s daily schedule affect their heart rate?
The heart rate is the ________________  variable.

• independent
• dependent