Worksheets02a Structure of the Circulatory System & Composition of Blood
Total questions: 18
Worksheet time: 9mins
What is the primary role of the circulatory system in complex multicellular organisms?
To synthesise proteins
To transport nutrients and remove waste products
To store energy
To regulate body temperature
Which of the following best describes the structure of the human heart?
A hollow organ made of smooth muscle
A solid organ made of skeletal muscle
A hollow organ made of cardiac muscle
A solid organ made of voluntary muscle
What role does the pulmonary circuit play in the human body?
To supply oxygenated blood to the heart
To oxygenate blood in the lungs
To filter toxins from the blood
To transport carbon dioxide to the liver
The component of blood primarily responsible for oxygen transport is (a)
The main function of white blood cells in the circulatory system is to (a)
Which of the following statements about haemoglobin is true?
It is a protein that transports glucose
It is a lipid that stores energy
It is a protein that carries oxygen
It is a carbohydrate that provides structure
What is the primary function of platelets in the blood?
To transport carbon dioxide
To initiate blood clotting
To carry hormones
To regulate pH levels
In the systemic circuit, what is the primary role of the arteries?
To carry deoxygenated blood to the lungs
To transport oxygenated blood to body tissues
To remove waste products from the body
To store excess nutrients
What is the significance of the biconcave shape of red blood cells?
It allows them to store more nutrients
It increases their surface area for gas exchange
It enables them to divide rapidly
It helps them to produce energy
What is the role of plasma in the blood?
To carry oxygen
To transport nutrients and waste
To initiate blood clotting
To fight infections
Which of the following is a characteristic of red blood cells in mammals?
They contain a nucleus
They have mitochondria
They are biconcave in shape
They are larger than white blood cells
What is the primary function of the systemic circuit in the circulatory system?
To oxygenate blood in the lungs
To transport oxygen and nutrients to body tissues
To remove waste from the kidneys
To deliver hormones to the brain
How do white blood cells differ from red blood cells?
White blood cells contain haemoglobin
White blood cells have a nucleus
White blood cells are biconcave
White blood cells transport oxygen
What is the lifespan of a typical red blood cell in the human body?
30 days
60 days
90 days
120 days
What is the primary role of the capillaries in the circulatory system?
To transport blood away from the heart
To facilitate the exchange of gases, nutrients, and waste between blood and tissues
To store blood
To regulate blood pressure
Which of the following is a function of the lymphatic system, which works closely with the circulatory system?
To transport oxygen
To remove excess fluid from tissues
To produce red blood cells
To store glucose
What is the main difference between arteries and veins?
Arteries carry blood towards the heart, veins carry blood away
Arteries have valves, veins do not
Arteries carry oxygenated blood, veins carry deoxygenated blood (with exceptions)
Arteries are smaller than veins
What is the role of the spleen in the circulatory system?
To produce red blood cells
To filter and recycle old red blood cells
To store oxygen
To produce hormones
