Biology 2 Flashcards
What side of the muscular wall is thicker
The left
What does the coronary artery do
Supplies the muscular wall of the heart with oxygenated blood
What does the coronary artery do
Supplies the muscular wall of the heart with oxygenated blood
What is blood pressure
When the heart contracts and pumps blood into the arteries under pressure
Why does systolic pressure occur
When the heart beats and pumps blood into the arteries
How does diastolic pressure occur
Between beats when the heaters relaxes & fills with blood.
What is the average blood pressure for an adult
120/80 mmHg
High blood pressure can cause
Heart attack and stroke
Low blood pressure can cause
Heart failure and fainting
Why do the lungs inflate
To take air into the the body & deflate to remove air from body
What does the windpipe do
It allows air to flow from the mouth or nose towards the lung
What is the bronchi
The 2 branches which join the windpipe to the lungs
What are the the bronchioles
Branches from the bronchi which lead to the air sacs
What do the air sacs do
They allow oxygen to pass from the lungs into the blood
What do the ribs do
They protects the lungs from damage
