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Pneumonia is a serious infection or inflammation of the lungs where the air sacs fill with fluid or pus. It makes breathing difficult and often causes a cough, fever, and chills.

Inflammation is when a part of your body becomes red, swollen, and painful because of an injury or infection. It is the body's natural way of protecting itself and starting the healing process.

A fracture is a crack or a break in something hard, especially a bone. It happens when a strong force is put on the bone, causing it to split or shatter.

A concussion is a mild brain injury caused by a hit to the head or a violent shaking of the body. It usually causes temporary symptoms like headaches, confusion, and dizziness.

A hemorrhage is a very heavy loss of blood from a broken blood vessel. It can happen inside the body or on the outside and usually requires quick medical help.

Physiology is the branch of biology that deals with how the bodies of living things function. It explains how organs, cells, and muscles work together to keep an organism alive.

The pancreas is a large gland located behind the stomach. It is an important organ that helps the body digest food and controls sugar levels in the blood.

A small gland in the front of your neck that looks like a butterfly. It makes hormones that control how your body uses energy and stays healthy.

A stethoscope is a medical tool that doctors and nurses use to listen to sounds inside the body. It is most often used to check the heart and the lungs for health.

A long piece of soft cloth or material used to cover and protect an injury. It is often wrapped around a body part to stop bleeding or keep a wound clean.