Circulatory System Flashcards
What are the different substances that make up blood?
Red blood cells and white blood cells and plasma
Red blood cells (erythrocytes) are
living cells in the blood that transport oxygen to all other living cells in the body
Haemoglobin are
the red pigment in red blood cells that carries oxygen
Oxygen reacts with haemoglobin in red blood cells to form
oxyhaemoglobin, making the blood even brighter
White blood cells (leucocytes) are
living cells that fight bacteria and viruses as part of the human body’s immune system
What are platelets? What do they do?
They are small bodies involved in blood clotting. They are responsible for healing by clumping together around a wound.
What are the three types of blood vessels?
Arteries
Veins
Capillaries
Arteries are
hollow tubes (vessels) with thick walls carrying blood pumped from the heart to other body parts
Veins are
blood vessels that carry blood back to the heart. They have valves and thinner walls than arteries.
Capillaries are
minute tubes carrying blood to body cells. Every cell of the body is supplied with blood through capillaries.
What to valves do?
Ensure flow of blood is in one direction
Which blood vessel contain valves?
Veins
What is the main function of the heart?
Removes deoxygenated blood from the body and pumps oxygenated blood to the body
What are the four chambers of the heart?
Right atrium
Right ventricle
Left atrium
Left ventricle
Left atrium is the
upper left section of the heart where oxygenated blood from the lungs enters the heart
