Science Quiz - Circulatory & Respiratory Systems Flashcards
What system carries blood throughout the body?
Circulatory System
What returns blood to the heart?
Veins
What forms a complicated system of connecting tubes throughout the body?
Blood Vessels
When your diaphragm relaxes and moves back to its domed shape, you are…
Expiration
What system is primarily used for gas exchange?
Respiratory System
What is a hollow, muscular organ that pumps blood?
Heart
What gas do you need to breathe out?
Carbon Dioxide
What is the process of taking air into and out of the lungs?
Breathing
What gas do you need to breathe in?
Oxygen
When your diaphragm contracts and moves downwards, you are…
Inspiration
What are extremely tiny vessels that connect the arteries and the veins?
Capillaries
What is made mostly of water but also contains proteins, minerals, and other substances?
Plasma
What returns blood to the heart?
Veins
What carries oxygen and carbon dioxide throughout the body?
Red Blood Cells
