Cardiovascular System
Respiratory System
Digestive System
Nervous System
Endocrine System
100

These blood vessels carry oxygen-rich blood away from the heart.

What are arteries?

100

These tiny air sacs in the lungs are where oxygen enters the blood and carbon dioxide leaves it.

What are alveoli?

100

This muscular tube connects the mouth to the stomach.  

What is the esophagus?

100

These cells transmit electrical impulses throughout the nervous system.

What are neurons?

100

These chemical messengers are secreted into the blood to regulate body functions.

What are hormones?

200

What is the largest vein in the body?

The Inferior Vena Cava (IVC).

200

This muscle contracts to allow the lungs to expand during inhalation.

What is the diaphragm?

200

This organ produces bile, which helps break down fats during digestion.

What is the liver?

200

This part of the brain controls balance and coordination.

What is the cerebellum?

200

This hormone, made by the pancreas, lowers blood glucose levels.

What is insulin

300

This type of blood pressure is measured when the heart is contracting. 

What is systolic pressure?

300

This iron-containing protein in red blood cells binds oxygen for transport throughout the body.

What is hemoglobin?

300

Yellowing of the skin and eyes is a sign of this buildup of bilirubin from liver or bile duct problems.

What is jaundice?

300

This disease occurs when the immune system attacks the protective myelin sheath around neurons, slowing nerve signals.

What is multiple sclerosis (MS)?

300

This disease occurs when the pancreas doesn’t make enough insulin, causing high blood sugar levels.

What is diabetes mellitus?

400

This condition happens when the heart cannot pump enough blood to meet the body’s needs.

What is heart failure?

400

This lung infection fills the air sacs with fluid or pus, making it hard to breathe deeply.

What is pneumonia?

400

This enzyme, found in saliva, begins the chemical breakdown of carbohydrates.

What is amylase?

400

This viral infection can inflame the brain or its protective membranes, leading to symptoms like fever, stiff neck, and confusion.

What is meningitis (or encephalitis)?

400

This hormone from the hypothalamus controls the release of LH and FSH from the anterior pituitary.

What is gonadotropin-releasing hormone (GnRH)?

500

Long-term high blood pressure forces the heart to work harder, eventually leading to this type of thickening of the heart muscle.

What is left ventricular hypertrophy?

500

This emergency procedure creates an opening in the windpipe to help someone breathe when their airway is blocked.

What is a tracheotomy?

500

Chronic infection with this bacteria can cause peptic ulcers and increase the risk of stomach cancer.

What is Helicobacter pylori (H. pylori)?

500

This cranial nerve controls heart rate, digestion, and other parasympathetic functions.

What is the vagus nerve (Cranial Nerve X)?

500

This hormone from the adrenal cortex helps the body retain sodium and water, increasing blood pressure.

What is aldosterone?