Coordinated body systems 2.2 Flashcards
What is the main purpose of the?
1. digestive systems
2. respiratory systems
3. circulatory systems
4.excretory systems
●Digestive: Digest and absorb nutrients
●Respiratory: Gas exchange
●Circulatory: Gas & nutrient transport
● Excretory: Waste removal
Cellular respiration word equation
oxygen + glucose —> carbon dioxide + water
what does food contain
complex nutrients
(carbohydrates, proteins and lipids)
Through chemical digestion, carbohydrates, proteins, and lipids are broken
down into simple substances. What are they?
■ Carbohydrates —> glucose
■ Protein —-> amino acids
■ Lipids —-> fatty acids and glycerol
How are simple substances absorbed through the walls of the small intestine
the small intestine is made up of lots of tinny villi. Each villus has a tinny blood vessel called a capillary and…
These simple substance (glucose, amino acids and fatty acids, glycerol) are easily
absorbed through the walls of the
small intestine into?
the capillaries
and into the bloodstream (via diffusion)
What happens in your digestive systems
absorbting, digestion and excreation
What is diffusion
● The random movement of particles from an area
of high concentration to an area of low
concentration until at equilibrium.
● This is due to more collisions occurring in areas
of high conc.
Examples:
● Glucose diffuses from inside the small intestine
to blood capillaries
● Oxygen diffuses from inside the lungs to blood capillaries
What is diffusion
● The random movement of particles from an area
of high concentration to an area of low
concentration until at equilibrium.
● This is due to more collisions occurring in areas
of high conc.
Examples:
● Glucose diffuses from inside the small intestine
to blood capillaries
● Oxygen diffuses from inside the lungs to blood capillaries
what does the respiratory system do
it inhales oxygen and exhales carbon dioxide
why do we need oxygen
we need oxygen for every cell and tissue
How is gas exchange possible between the Alveoli and capillaries
the surface is only 1 cell thick, there is a dense capillary network.
What does the blood contain
blood contains gases, nutrients and wastes
which will be supplied and removed by the other
systems.
plasma, red blood cells, white blood cells, and platelets.
What does the circulatory system supply to the cells?
Supplies to Cells:
● Oxygen gas (via respiratory system)
● Glucose and other nutrients (via digestive system)
What does the circulatory system remove from cells?
Removes from Cells:
● Carbon dioxide (via respiratory system)
● Urea and other wastes (via excretory system)
