Circulation and Respiration

The body system that circulates blood throughout the body.

• Circulatory System
• Digestive System
• Nervous System
• Respiratory System

The function of the heart is to 

• pump blood
• fight disease
• exchange gases
• create energy

Carrying oxygen and nutrients, fighting pathogens, and reducing blood loss are some of the functions of 

• lymph
• blood
• the lungs
• the thymus

Blood vessel that carries blood from the heart

• artery
• vein
• capillary
• alveoli

Air sacs in the lungs where oxygen and carbon dioxide are exchanged

• tonsil
• trachea
• alveoli
• spleen

The passage from the mouth to the larynx and esophagus

• pharynx
• tonsil
• artery
• blood

_________ help the body fight pathogens.

• Red blood cells
• White blood cells
• Platelets
• Veins

_________ deliver oxygen to the blood.

• Red blood cells
• White blood cells
• Alveoli
• Platelets

The _______ contains the vocal chords.

• Veins
• larynx
• pharynx
• bronchi

Is the heart a voluntary or involuntary muscle?

• voluntary
• involuntary