Digestive System
Respiratory System
Circulatory System
The Heart
Mixed Systems
100

This organ is where most nutrient absorption occurs. 

Small Intestine

100

These grape-like sacs are where oxygen and carbon dioxide are exchanged.

Alveoli

100

These blood vessels carry blood away from the heart.

Arteries

100

This side of the heart receives blood from the body and transports it to the lungs.

Right

100

These two systems work together to deliver oxygen to the body's cells.

Respiratory and Circulatory
200
These two organs use mechanical and chemical digestion to break down food.

Mouth and Stomach

200

These tiny hair-like structures line the trachea to trap and move debris upwards.

Cilia

200

These vessels are one cell thick to facilitate gas exchange.

Capillaries

200

This chamber of the heart pumps oxygenated blood to the body. 

Left Ventricle

200
This system works with the digestive system to distribute absorbed nutrients to the body.

Circulatory

300

This accessory organ produces bile that is used to digest lipids in the small intestine.

Liver

300

This structure splits the respiratory system into two. 

Bronchi

300
Majority of blood is made of this component.

Plasma

300

Our body undergoes these two types of circulation.

Systemic and Pulmonary

300

This structure spans part of both the digestive and respiratory system. 

Pharynx
400
These two enzymes are found in saliva.

Amylase and Lipase

400

This structure is also known as the voice box.

Larynx

400

This iron-containing protein found in red blood cells allows blood to become oxygenated.

Hemoglobin

400
Blood leaves the heart from these vessels to become oxygenated.

Left and Right Pulmonary Arteries.

400

This structure blocks the pathways between the respiratory and digestive system.

Epiglottis

500

This circular muscle controls the movement of food from the stomach to the small intestine.

Pyloric Sphincter

500
This is the extra volume of air that one can inhale after taking a normal breath.

Inspiratory Reserve Volume (IRV)

500

Red Blood Cells have this specific shape, making them more flexible to travel through vessels.

Biconcave

500

This valve separates the right atrium and right ventricle. 

Atrioventricular (AV) tricuspid valve

500

This is the teacher's favourite system.

Digestive

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