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27 Cards in this Set

  • Front
  • Back

What is transported in blood?

Oxygen, Carbon Dioxide and nutrients

What protein is important in red blood cells for the carrying of oxygen?


What are 3 features of red blood cells?

Has no nucleus, has a biconcave shape and has haemoglobin.

When haemoglobin combines with oxygen, what is made?


What vessels transport blood to the heart?


What vessels transport blood away from the heart?


What vessels are involved in gas exchange?


Describe the direction of blood flow through the heart. (vessels and chambers)

Vena cava > Right atrium > Right ventricle > Pulmonary Artery > (Lungs) > Pulmonary Vein > Left atrium > Left ventricle > Aorta

Which side of the heart carries deoxygenated blood?


Which side of the heart carries oxygenated blood?


What is the function of valves?

To prevent the backflow of blood

Which blood vessel contains valves?


What is the feature of capillaries which makes them efficient in their function?

They are one cell thick

What is the features of the trachea?

Contain rings of cartilage, have cilia and mucus

What is the purpose of the rings of cartilage in the trachea?

To help keep the airways open

Describe how the mucus and cilia work together

The mucus traps the dirt/dust/microbes and the cilia beat the mucus upward towards the throat to be swallowed.

What is the name given to the tiny air sacs in the lungs?

Alveoli (Pleural) or alveolus (singular)

List 3 features of alveoli

They have a moist lining, they are one cell thick and they are surrounded by lots of capillaries.

What is the purpose of digestion?

To break down large insoluble food molecules into smaller soluble food molecules to allow absorption into the bloodstream through the small intestine wall.

How does food molecules move through the digestive system?

By the process of peristalsis.

How does peristalsis work?

Peristalsisis a wave-like motion which occurs when the circular musclesin front of the food relax and at the same time circular muscles behind thefood contract pushing the food along.

Why is the small intestine efficient at its function?

It has a large surface area

What gives the small intestine its large surface area?

It is covered in lots of Villi (finger-like projections)

Name this structure

Name this structure

Vilus (singular) or Villi (plural)

What are features of the Villi?

They are one cell thick, they have a good blood supply and have a large surface area.

In a vilus, what is the purpose of the lacteal?

To absorb fatty acids and glycerol.

In a vilus, what is the purpose of the blood capilaries?

To absorb glucose and amino acids.