Unit 3.Circulatory System Flashcards
What does the circulatory system do
It transports substances around the body
What are the components of the circulatory system
The heart ,blood vessels and blood
What is contained in blood
Digested food White blood cells (1%) Waste Platelets Hormones Plasma [4%] Carbon dioxide Oxygen Red blood cells (50%)
Where does blood carry nutrients and oxygen
To the cells
And removes carbon dioxide and waste from the cells
Where are the waste products sent to
The excretory organs
Lungs,kidney ,skin
,
What are the nutrients and oxygen used for
For respiration and raw materials for growth
True or false
Humans have a closed blood system
True
This means that of life throws around the body contained in blood vessels
What are capillaries
The are the smallest blood vessels in the circulatory system and a punched up from the arteries
What makes it easy for nutrients and gasses to pass through thr capillary walls easily
It has thin walls
What are veins
Blood vessels that carry blood to the heart (van)
What do you veins removed
Come dioxide and other waste substances from the cells
What are the main functions of the circulatory system
Circulating blood between the heart and the lungs
The blood going out of the heart are oxygen poor and the blood that goes into the heart is oxygen rich (veins)
It also circulates blood throughout the whole body and provides oxygen rich form the lungs blood to every living cell
What are the 3 types of blood vessels
Arteries veins and capillaries
How are human red blood cells adapted to their function
They have no nucleus
What is the function of blood plasma
To transport digested food
