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Digestive/Excretory
Question | Answer |
---|---|
What is the function if the digestive system? | To break down food and extract any usable nutrients along the way |
How does the mouth begin mechanical digestion? | The teeth and tongue break food into smaller pieces |
How does the mouth begin chemical digestion? | Saliva contains an enzyme called amylase to break down food |
This is also called the food tube | esophagus |
What is peristalsis? | Involuntary muscle contractions that move food |
The stomach is what shape? | J shaped |
Why is mucus in the stomach? | To protect it from the acid in your stomach |
What are pepsin and rennin? | Digestive enzymes found in the stomach |
What organ makes bile? | The liver |
What does bile do? | Helps to digest fats |
Where is bile stored? | The gallbladder |
Where are most of the nutrients absorbed? | In the small intestine |
Which is longer: the small intestine or the large intestine? | SMALL! |
Which is bigger around:the small intestine or the large intestine? | LARGE! |
What is the name of the structures inside the intestine where all the absorption takes place? | Villi |
What happens in the large intestine? | Excess water is absorbed |
What is the function of the excretory system? | To remove waste materials from the body |
Why are lungs part of the excretory system? | Because they function to remove carbon dioxide from the body which is a waste gas |
Why is the skin part of the excretory system? | Because it releases sweat which contains waste products |
What do kidneys do? | Filter the blood for waste |
Where is urine held while waiting to be released ? | bladder |
What is a dialysis machine? | It is a machine that is used when kidneys are not functioning properly. It filters the blood |
What is the name of the acid in our stomachs? | hydrochloric (HCl) |