Respiratory System + Circulatory System

The System that contains blood vessels and the heart is the...

• circulatory system
• respiratory system
• digestive system
• Integumentary System

When you breathe, your lungs take in ___ and remove ___.

• air, oxygen

• oxygen, carbon dioxide

• carbon dioxide, waste

• waste, air

Identify this system.

• Digestive System

• Circulatory System

• Immune System

• Respiratory System

Red blood cells hold onto O₂ with the protein ________ which needs the element ________.

• hemoglobin, phosphorus

• hemoglobin, iron

• myoglobin, phosphorus

• myoglobin, iron

This part of blood helps it clot, when you get cut.

• Red blood cells
• Plasma
• Platelets
• White blood cells

_______ is/are made mostly of water and makes up about 55% of the blood

• Plasma

• Platelets

• Red blood cells

• White blood cells

What does blood transport?

• Nutrients
• Oxygen 
• Carbon Dioxide
• All of the above

The part of the respiratory system that humans use for talking is the...

• trachea

• pharynx

• larynx

• bronchi

The small blood vessels where exchange of O₂ and CO₂ occurs are called...

• arteries

• capillaries

• veins

• heart

The part of the lungs where gas exchange occurs is/are called.

• trachea

• bronchi

• bronchioles

• alveoli