The Respiratory and Circulatory System-Week 2

The tiny air sacs in the lungs where gas exchange takes place are called:

• Alveoli

• Bronchioles

• Trachea

• Diaphragm

The process of taking in air, which includes oxygen, into the body is called:

• Inhale

• Exhale

• Breathe

• Ventilate

The process of letting out air, which includes carbon dioxide, from the body is called:

• Exhale

• Inhale

• Breathe

• Ventilate

The main airway that carries air to and from the lungs is called:

• Trachea

• Bronchioles

• Alveoli

• Diaphragm

The tube-like structures that carry blood throughout the body are called:

• Blood vessels

• Arteries

• Veins

• Capillaries

The rate at which a person breathes, measured in breaths per minute, is called:

• Breathing rate

• Heart rate

• Pulse rate

The pair of organs that help in gas exchange

• Lungs

• Heart

• Diaphragm

• Ribs

The system that brings oxygen from the air to our body so that it can be transported around the body

• Respiratory system

• Circulatory system

• Digestive system

• Nervous system

The liquid in blood vessels that transports subtances around the body

• Blood

• Plasma

• Serum

• Hemoglobin

The process of moving air in and out of the lungs is called:

• Breathing

• Respiration

• Ventilation

• Inhalation