Cardiovascular System
This is the largest artery in the human body.
What is the aorta?
This part of the respiratory tract is also known as the windpipe.
What is the trachea?
This part of the digestive tract stores and churns food into chyme.
What is the stomach?
This organ stores urine until it is excreted.
What is the urinary bladder?
This outer layer of skin provides protection and contains keratin.
What is the epidermis?
This valve sits between the right atrium and the right ventricle
What is the tricuspid valve?
These tiny air sacs in the lungs are the site of gas exchange.
What are alveoli?
These finger-like structures in the small intestine increase surface area for absorption.
What are villi (and microvilli)?
This is the functional unit of the kidney where urine is produced.
What is the nephron?
These glands secrete sweat and are activated during emotional stress.
What are sweat glands?
This component makes up 45% of blood and carries oxygen.
What are red blood cells (erythrocytes)?
Oxygen in the lungs binds to this molecule in the blood.
What is hemoglobin?
This organ stores bile produced by the liver.
What is the gallbladder?
This blood vessel supplies the kidney with blood.
What is the renal artery?
This muscle causes goosebumps by pulling hair upright.
What is the arrector pili muscle?
This node is the pacemaker of the heart's atria.
What is the SA node?
This flexible flap of cartilage prevents food from entering the airway during swallowing.
What is the epiglottis?
This hormone-producing organ also neutralizes stomach acid with its juices.
What is the pancreas?
This tube carries urine from the bladder to outside the body.
What is the urethra?
The layer beneath the dermis that insulates and anchors skin.
What is the hypodermis?
This is the name for the formation of all blood cells.
What is hematopoiesis?
This happens to the intrapulmonary pressure during inspiration.
What is decreasing?
This type of protein breaks down food in the mouth, stomach and intestines.
What is enzymes?
This test is commonly used to screen for infections and medical conditions through urine.
What is urinalysis?
This accessory organ of skin helps protect the fingers and toes.
What are nails?