This is the body system responsible for fighting diseases.

These are non-harmful substances that the body reacts against.

This is the type of allergy that is mainly caused by the inhalation of allergens in the air.

This refers to allergies developing in adulthood.

These are bumps on the skin, and a symptom of many types of allergies.

This is the body system that is the most affected by asthma.

These refer to the swelling that body parts can experience.

This is the type of asthma that is mostly due to the body recognizing a substance as harmful and acting against it.

This refers to an infection of the lungs and alveoli.

This refers to a type of asthma that is triggered by workplace irritants.

This is where bones are attached to bones.

This is a disease that affects the joints, and can make them stiff and painful.

This is the type of arthritis that is a result of cartilage being damaged.

This refers to the lubricating fluid in joints.

This is a condition that leads to the appearance of scaly red patches in the skin.

Heartburn is caused by the exertion of the heart.

Smoking increases the chances of heart disease developing.

Plaques can lead to many different heart diseases.

Cholesterol and fat in the blood have no connection to heart disease.

Heart murmurs can be a sign of a heart condition.

All cancer symptoms are the same.

Abnormal cells breaking off from a tumor can cause metastasis.

Chemotherapy has a wide range of side effects. 

Abstinence from smoking and alcohol can be a protective factor. 

Malignant tumors are the ones that are life-threatening.