LO1: Cardiovascular System

Question 1

What are the four components of blood?

Answer 1

Red blood cells (erythrocytes)
White blood cells (leukocytes)
Platelets
Plasma

Question 2

What are Red Blood Cells (erythrocytes)?

Answer 2

Made in the bone marrow, red due to having haemoglobin, transport O2 and CO2 in the body, don’t have nucleus, increases space to carry maximum amount of haemoglobin, have thin disc like shape to maximise surfce area for exposure to oxygen, small and flexible to get into narrow blood vessels

Question 3

What are White Blood Cells (leukocytes)?

Answer 3

Part of the body’s immune system, immune cells that defend body agaisnt infection, detect abnormal material and destroy it, neutrohphils protect body against bacterial infections, monocytes are formed in the bone marrow and released into blood and tissues, when germs enter the body quickly rush to attack

Question 4

What are Platelets?

Answer 4

Produced in the bone marrow, fragments of larger cells, disc shaped, helps to form blood clots by clumping together to slow/ stop bleeding to form scabs so wounds will heal

Question 5

What is Plasma?

Answer 5

Largest component of blood, clear yellowish liquid, carries platelets, red and white blood cells, provides measn of transport for components of blood in the body

Question 6

What are the Functions of Blood?

Answer 6

Temperature regulation
Transport
Exchange of materials with body tissue
Preventing infection
Blood clotting

Question 7

What is Temperature Regulation?

Answer 7

Process of thermo-regulation maintains optimum body temperature, blood plays a role in temperture regulation, distributes heat through the body from core to surface and vice versa

Question 8

How does blood use Transportation?

Answer 8

Blood vessels like network of roads where delieveries and watse removal takes place, oxygen, nutrients and hromones delivered around the body and in th blood carbon dioxide and other waste products are removed