Digestive System
What is the role of the digestive system?
To break down and extract nutrients from the food we eat.
How many chambers does the human heart have?
4
What does the word 'excrete' mean?
To separate and expel waste from the body.
Name the organ that allows air to move from the mouth/nose to the lungs.
Trachea
What is the role of the skeletal system?
Keep body upright against gravity and protecting vital organs.
What organ passes chewed up food to the stomach?
Oesophagus
What blood cell is responsible for carrying oxygen to the cells of the body?
Red blood cells.
What waste product is expelled from the lungs?
Carbon dioxide.
The lungs have a role in the excretory system. True or false?
True. They excrete carbon dioxide.
Name one muscle (scientific term) and describe where it is located.
Answers will vary.
Example: bicep, is in the upper arm.
The acid in the stomach is an example of:
mechanical/chemical digestion
Chemical
What kind of blood vessels are responsible to delivering oxygen to the cells/tissues of the body?
Capillaries
What is the role of the kidney in excreting waste?
Filters the blood, removing waste as urine.
Name the structures where gas exchange occurs.
Alveoli
What muscle is critical inflating and deflating the lungs?
The diaphragm
In what organ does nutrient absorption occur?
Small Intestine
Name the ventricle of the heart has the largest muscular walls and explain why.
Left ventricle, is responsible for pumping all oxygenated blood to all the parts of the body.
Name the tube that carries urine from the kidneys to the bladder?
Ureter
Name the structure that controls whether substances go to the lungs or stomach?
Epiglottis
Name the structure that connects the muscles to the bones.
Ligaments
What is the role of bile in digestion?
To break down fats, allowing fatty acids to be absorbed into the bloodstream for energy use.
One-way valves are present in one type of blood vessel only. Which one?
Veins. They stop blood running back down to the feet under the influence of gravity.
Donated kidneys for transplant must always come from a living donor. True or False?
False
Why does the body need oxygen?
To be able to extract energy from food, that occurs in the mitochondria of living cells.
The bones of the skeletal system helps our bodies to be upright and to move around. They have another important function, what is it?
Blood cells are made in bone marrow.