Page 40 - Science Course 2 (Book 1)

Mo2-L2a: Digestive System: Absorption and Elimination

Processing Oxygen and Wastes

After nutrients are absorbed during digestion, the
digestive system removes solid waste products,
called feces, through the rectum.

The respiratory and circulatory systems remove
carbon dioxide (CO2) from the body.

Processing Oxygen and Wastes

Oxygen helps the body obtain
energy from nutrients by
performing cellular
respiration.

Oxygen enters the
body through the
respiratory system.

When you inhale, the
respiratory system
works with the circulatory The CO2 produced by cells throughout the body
system and transports oxygen to all cells in the body. enters capillaries and is transported to the lungs,
where it is exhaled.

Liquid waste travels
Trachea Trachea through the circulatory
Lungs Lungs
system to the kidneys in
the excretory system,
which make urine to be
removed from the body.

Diaphragm Diaphragm

The muscular system also helps the respiratory Renal Vein Renal Cortex
system by expanding your chest so that air sacs in Renal
the lungs fill up with oxygen. Papilla
Renal
The Respiratory System Piramids
Renal
Columns
Trachea
Bronchial Fibrous
tubes Capsule
Lung
Bronchiole Alveoli
Renal Pelvis
Ureter
Blood flow Blood flow

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