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Thoracic Diaphragm

The thin muscle below the lungs and heart that separates the chest from the abdomen.

PubMed Health Glossary
(Source: NIH - National Cancer Institute)

Terms to know

Alveoli
Tiny air sacs at the end of the bronchioles (tiny branches of air tubes) in the lungs. The alveoli are where the lungs and the bloodstream exchange carbon dioxide and oxygen. Carbon dioxide in the blood passes into the lungs through the alveoli. Oxygen in the lungs passes through the alveoli into the blood.
Arteries
A blood vessel that carries blood from the heart to tissues and organs in the body.
Bronchi
The large air passages that lead from the trachea (windpipe) to the lungs.
Bronchioles
A tiny branch of air tubes in the lungs.
Duodenum
The first part of the small intestine that connects to the stomach.
Esophageal Hiatus
The esophageal hiatus is a hole in the diaphragm through which the esophagus and the vagus nerve pass.
Gallbladder
The organ that stores the bile made in the liver and that is connected to the liver by bile ducts. The gallbladder can store about 2 tablespoons of bile. Eating signals the gallbladder to empty the bile through the bile ducts to help the body digest fats.
Liver
The largest abdominal organ. The liver carries out many important functions, such as making important blood proteins and bile, changing food into energy, and cleaning alcohol and poisons from the blood.
Lobe
A portion of an organ, such as the liver, lung, breast, thyroid, or brain.
Lungs
One of a pair of organs in the chest that supplies the body with oxygen, and removes carbon dioxide from the body.
Lymph Nodes
A rounded mass of lymphatic tissue that is surrounded by a capsule of connective tissue. Lymph nodes filter lymph (lymphatic fluid), and they store lymphocytes (white blood cells). They are located along lymphatic vessels. Also called lymph gland.
Pancreas
An organ that makes insulin and enzymes for digestion. The pancreas is located behind the lower part of the stomach and is about the size of a hand.
Stomach
An organ that is part of the digestive system. The stomach helps digest food by mixing it with digestive juices and churning it into a thin liquid.
Thorax
Having to do with the chest.
Trachea (Windpipe)
The airway that leads from the larynx (voice box) to the bronchi (large airways that lead to the lungs). Also called windpipe.
Veins
Blood vessels that carry blood to the heart.

Terms to know

Alveoli
Tiny air sacs at the end of the bronchioles (tiny branches of air tubes) in the lungs. The alveoli are where...
Arteries
A blood vessel that carries blood from the heart to tissues and organs in the body....
Bronchi
The large air passages that lead from the trachea (windpipe) to the lungs....
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