AQA Combined GCSE Science the Heart + Lungs

What type of circulatory system do humans have?

Double circulatory system

Where does the right ventricle pump blood to?

lungs via the pulmonary artery

Where does the left ventricle pump blood to?

the whole body via the aorta

what blood vessel does the left ventricle join to?

aorta

what blood vessel does the right ventricle join to?

pulmonary artery

what blood vessel joins to the right atrium?

vena cava

what blood vessel joins to the left atrium?

pulmonary vein

How does air travel through the respiratory system?

in through the mouth, down the trachea, into the bronchus then the bronchioles, into alveoli

how is the natural resting heart rate controlled

By a group of cells located which act as a pacemaker

where is the pacemaker located

in the wall of right atrium

what are artificial pacemakers?

Electrical devices used to correct irregularities in the heart rate

name the 3 types of blood vessels

arteries, veins, capillaries

what is the function of the heart?

To pump blood around the body

what type of blood vessel returns blood back to the heart from the body?

veins

what type of blood vessel pumps blood away from the heart?

arteries

what is the function of capillaries?

connect arteries and veins

Do arteries carry oxygenated or deoxygenated blood?

oxygenated

Do veins carry oxygenated or deoxygenated blood?

deoxygenated

do arteries carry blood under high or low pressure?

high

do veins carry blood under high or low pressure?

low

do veins or arteries have a wider lumen?

veins

what type of walls do arteries have?

thick, muscular, elastic walls

what type of walls do veins have?

thin walls