The proper functioning of the circulatory system is essential for health. Blood transports substances around the body to every cell and removes toxic waste. It also defends against disease.
Which part of the blood is responsible for transporting oxygen around the body?
White blood cells
Red blood cells
Which of these is an adaptation of red blood cells to carry oxygen?
Biconcave shape for a large surface area
Large nucleus to pack oxygen in
Contains chlorophyll to pick up the oxygen
What two steps are taken by a phagocyte to destroy a microbial invader?
Engulf, then digest
Digest, then engulf
Attach and relocate
What is the function of platelets in the blood?
To engulf and digest microbes
To clot the blood
To carry urea
Which vessel returns blood from the body to the heart?
What is the function of valves in the circulatory system?
To only let oxygenated blood through
To only let deoxygenated blood through
To stop blood flowing backwards
Which chamber of the heart contracts with the highest pressure?
The walls of which type of blood vessel are only one cell thick?
Which substance can build up in coronary arteries leading to heart disease?
Which treatment for heart disease involves the insertion of a small balloon into a blood vessel?
Changes to lifestyle