The process of moving blood throughout parts of the body is...

• respiration.

• exercise.

• circulation.

• breathing.

Which of the following is NOT part of the circulatory system?

• blood

• lungs

• heart

• blood vessels

The muscular organ that pumps blood through the circulatory system is the...

• liver.

• stomach.

• lungs.

• heart.

The tubelike structure in the body through which blood flows is a...

• blood vessel.

• bronchial tube.

• trachea.

• small intestine.

Which of the following is a type of blood vessel?

• vein

• artery

• capillary

• all of the above

Blood that contains more oxygen is brighter red than blood with less oxygen.

• true

• false

Which of the following is a reason why a person's pulse would increase or decrease? [Check all that apply.]

• emotions

• frequent activity

• temperature

• day of the week

Valves in the heart allow blood to flow in any direction.

• true

• false

Tiny structures in blood that carry oxygen to body tissues are...

• white blood cells.

• plasma.

• red blood cells.

Tags

NGSS.MS-LS1-3

Blood cells that contain structures that fight infections are...

• white blood cells.

• plasma.

• red blood cells.