2.3 energy and waste Flashcards
(32 cards)
The amount of energy is measured in calories
calorie
The amount of energy it takes to raise the temperature of kg of water by 1c
calorie
Releases the energy from the processed food
Your digestive system
The parts of food used by the body to grow and survive
Nutrients
5 Examples of Nutreints
Proteins,fats,carbohydrates,vitamins,and minerals
the mechanical and chemical breakdown of food into small particals and molecules that your body can absorb and use
Digestion
The 4 steps of digestion
ingestion,ingestion,absorbption,and elimanation
When you chew,mash and gring food whith your teeth and tongue
Mechanical Digestion
Break down pieces of food into small molecules
Chemical Digestion
When you put foodsuch as bread in your mouth
Ingestion
An enzyme in your mouth that helps break down carbohydrates
Saliva
A muscular tube that connects the mouth to the stomach
Esophagus
Food moves through the esophagus and the rest of the digestive tract by waves of muscle contractions
Peristalsis
a large, hollow organ that stores food
Stomach
An adult stomach can hold about___________ of food and liquid
2 liters
Enabe the stomach to expand and hold large amouts of food
The folds on the inner walles
The celles in theses folds produce chemicals that help breal down______
proteins
This stomach fluid makes the stomach acidic
Gastric juice
An enzyme that helps break down the proteinsin foodinto amino acids
Pepsin
An long tube that ic connected to the sromach it is about 7 m (23 ft) long
Small Intestine
Fingerlike projection that cover the folds of the small in testine
villi
Nutreints enter the blood vessels in this digestive organ
small in testine
Also know as the clon
large intestine
is about 1.5 m (5 ft ) long. it has a larger diamiter (about 5 cm or 2 in) than the small intestine
large intestine
