Vocabulary
A part of food used by the body to grow and survive.
Nutrient
When does the first step of digestion usually occur?
When the food is chewed.
What is the function of peristalsis?
To move food through the digestive system.
Bean-shaped organs that filter, remove waste from blood.
Kidneys
____ are the major food-producing organs of plants.
Leaves
the amount of energy it takes to raise the temperature of 1 kg of water by 1 degree C.
Calorie
Food enters the human body through the:
Mouth
a muscular tube that connects the mouth to the stomach
esophagus
What role does the respiratory system play in the excretory system?
The respiratory system removes carbon dioxide from the body, which is waste.
Why is mechanical digestion necessary?
Breaks food into small pieces.
the mechanical and chemical breakdown of food into small particles and molecules that your body can absorb and use
digestion
Digestion begins in the mouth with chewing and ____ beginning to break down food.
saliva
the system that collects and eliminates wastes from the body and regulates the level of fluid in the body.
excretory system
What role does the skin play in the excretory system?
Skin removes waste in the form of excess salt and water through sweat glands.
Why is chemical digestion necessary?
Breaks the small pieces down into molecules for absorption in the body.
Absorption in the small intestines occurs through the walls of fingerlike projections called:
Villi
Chewing is what kind of digestion?
Mechanical Digestion
Most chemical digestion and nutrient absorption occurs here
Small Intestine
Knowing that multiple systems play a role in the excretory system, how would you explain the statement that the body is a group of interacting systems and subsystems?
Each body system is needed to remove waste in their system. No individual part of the system can do all the tasks on its own.
Name the order/process in which nutrients move through the body.
1. Mouth/Tongue
2. Esophagus
3. Stomach
4. Small Intestine
5. Large Intestine
____ is a series of chemical reactions that convert light energy, water, and carbon dioxide into the food-energy molecule glucose and give off oxygen.
Photosynthesis
Put these in order of the digestion process:
A. Nutrients and water in the food are absorbed.
B. Undigested food is eliminated.
C. Food is ingested.
D. Food is digested.
C, D, A, B
Its functions are to temporarily store food and aid in chemical digestion
the stomach
What are the two functions of the excretory system?
1. collect and eliminate waste from the body.
2. Regulate the fluid level in the body.
How do nutrients enter and get processed by the body?
food must be digested in order for nutrients to be obtained by the body