A selectively permeable cell membrane is one that allows certain molecules or ions to pass through it by means of active or passive transport
What is the role of the respiratory system?
To help your body rest.
To pump blood throughout the body.
To bring oxygen in and carbon dioxide out.
To control your nerves.
What is the role of the circulatory system?
To circulate around your body.
To pump blood throughout your body.
To get rid of harmful viruses.
To digest your food.
The hardest working organ in the circulatory system is...
The heart
The left ventricle
The right ventricle
The lungs
One way to keep homeostasis is by using a high concentration of carbon dioxide in the blood which triggers faster breathing so the lungs can get rid of carbon dioxide quickly.
Which of these is in the digestive system?
Heart
Lungs
Kidneys
arteries
Which of these is not in the circulatory system?
Ventricles
Arteries
Which of these organs is in the respiratory system?
Ribs
Oxygen
Carbon dioxide
About how long does it take for a cow to digest its food.
80 hrs
24 hrs
48 hrs
60 hrs
What is in your saliva that helps break down food?
teeth
enzymes
tongue
cavities
Whats the square area of your small intestine
10 square meters
250 square meters
550 square meters
100 square meters
Where does digestion start?
At the mouth
At lungs
At the small intestine
At your brain
Where does the esophagus lead to?
Your kidneys
Your stomach
Your intestines
Your lungs
Mucus is in your body to protect your stomach so that it doesn't digest itself.
What is at the beginning of the large intestine?
The small intestine
The cecum
The esophagus
