We breath in. The rib cage expands and so do the lungs. This forces air to enter the lungs.
Inhalation
Why is the air in cities more polluted than the countryside?
It is because harmful substances released by cars, factories, and other sources of pollution.
What are some toxic substances found in tobacco?
Nicotine, tar, and carbon monoxide.
True/ False: The contraction of the heart is called diastole and the relaxation is called systole.
False
This transports nutrients and waste around the body as well as blood cells.
Plasma
In the lungs _____ dioxide is eliminated through respiration.
Carbon
The effects of tobacco can cause serious diseases such as _______ cancer.
Lung
We breath constantly. It is the process of obtaining oxygen from the air. We need oxygen to get energy from food.
Respiratory System
Arteries and veins become smaller and smaller until they become _______.
Capillaries
Sweat glands produce _____.
Sweat
They are two channels that carry urine from the kidneys to the bladder.
Ureters
This is the process of breaking down food into nutrients that our body can use.
Digestive System
The process of eliminating the waste produced in our body.
Excretory
True/ False: Smoking tobacco is healthy.
False
Salivary glands produce _____.
saliva
What are the four main systems of nutrition?
Digestive, Respiratory, Circulatory, and Excretory
What part of your body carries air in and out of your lungs?
Trachea
The organ where urine is stored. When it reaches a certain volume, it is expelled from the body.
Bladder
How many halves is the heart divided into?
2
Which body part continuously filters the blood?
Kidney