Transport in Animals

Front

What is the primary function of white blood cells in the body?

Back

To fight off pathogens and protect the body from infections.

Front

What happens to the pulse rate as people age, and what does this indicate?

Back

The pulse rate tends to fall with age, indicating that they can feel fatigued due to less oxygen circulating around their body.

Front

Why do arteries have thick elastic walls?

Back

To withstand the high pressure exerted by the blood as it is pumped from the heart.

Front

What is the liquid part of the blood called?

Back

Plasma.

Front

What distinguishes an artery from a vein in terms of structure?

Back

An artery has thick muscular and elastic walls, while a vein has thinner walls.

Front

What is the role of plasma in the blood?

Back

To transport nutrients, hormones, and waste products throughout the body.

Front

How do red blood cells contribute to the transport of oxygen?

Back

They contain hemoglobin, which binds to oxygen and carries it from the lungs to the body's tissues.

Front

What is the significance of a high white blood cell count?

Back

It often indicates that the body is fighting off an infection or inflammation.

Front

What is the difference between oxygenated and deoxygenated blood?

Back

Oxygenated blood carries oxygen from the lungs to the body, while deoxygenated blood carries carbon dioxide from the body back to the lungs.

Front

What is the function of capillaries in the circulatory system?

Back

To facilitate the exchange of oxygen, carbon dioxide, nutrients, and waste between blood and tissues.