Cardiovascular System Flashcards
What is the circulatory system?
The body’s blood-transporting system.
From what source do cell’s get their food?
Blood.
Why is oxygen important to blood and to the cell’s?
Oxygen is necessary for cell growth and repair.
Which type of blood vessel carries blood away from the heart?
Arteries.
Why is blood that flows to the heart bright red rather than dark red?
Oxygen makes it red.
What part of the blood carries minerals, vitamins, sugar, and other foods to the body cells?
Plasma.
What is the main job of the red corpuscles in the blood?
To transport oxygen to the body’s cells and carry away carbon dioxide from the cells.
What is the job of the blood platelets?
To clot blood.
What is the job of the white corpuscles?
To fight against disease.
Which element of the blood is round and colourless?
White blood cells.
What would happen to people who have an open wound and whose blood did not clot naturally?
They may bleed to death.
What happens when a clot occurs in an undamaged blood vessel?
The flow of blood to the tissues beyond the clot may be cut off.
What happens to blood when it is pumped into the thin-walled blood vessels of the lungs?
Carbon dioxide is replaced by oxygen.
What is the function of the blood vessels and capillaries?
They carry blood to all parts of the body.
Why does blood turn dark-red as it circulates through the body?
The oxygen in it is replaced by carbon dioxide.
How many major types of blood have scientists discovered?
There are 4 types: A, B, AB and O
What is the organ that pumps blood all throughout the human body?
The heart
Explain how the heart works.
- The heart receives oxygen deficient blood from the body into the right upper atrium.
- When the heart contracts, the right lower ventricle will pump blood into the lungs where carbon dioxide is exchanged for oxygen.
- After the exchange the blood containing fresh oxygen flows into the left atrium.
- Oxygen rich blood flows from left atrium to left ventricle.
- When the heart contracts the left ventricle forces the blood through a network of arteries.
