Cardiovascular System

Question 1

What is the circulatory system?

Answer 1

A system which carries blood and dissolved substances around the body. The heart pumps blood and substance around the blood vessels. The heart and blood vessels are the circulatory system.

Question 2

What vein carries blood from the digestive system to the Liver?

Answer 2

Hepatic portal vein

Question 3

What is the Bloods function?

Answer 3

• Transport vital substance
• Maintain stability of Interstitial/tissue Fluid
• Distribute heat

Question 4

What is in Blood?

Answer 4

• Red Blood cells
• White Blood cells
• Oxygen
• Carbon Dioxide
• Platelets
• Hormones
• Plasma
• Waste
• Digested food

Question 5

What is the proper name for a red blood cell?

Answer 5

Erythrocytes

Question 6

Characteristics of Erythrocytes?

Answer 6

• Main blood cell in the body
• One thrid Hemoglobin
• Biconcave to increase surface area
• Lack organelles such as Nuclei

Question 7

Function of Haemoglobin

Answer 7

To transport oxygen from an area of high oxygen to an area of low oxgen via diffusion.

i.e haemoglobin carries oxygen from lungs and takes to other area of the body low in oxygen.

Question 8

What is the proper name for White Blood Cells?

Answer 8

Leucocytes

Question 9

Name the two primary groups of Leucocytes?

Answer 9

Granulocytes

Agranulocytes

Question 10

Granulocytes are split up into 3 groups of cells . What are there names?

Answer 10

Neutrophils (50-70%)

Eosinphils (2-4% volume)

Basophils (0.5 - 1%)

Question 11

Agranulocytes are split up into 3 groups. What are there names?

Answer 11

• Lymphocytes
• Monocytes
• Macrophages

Question 12

What is the function of Platelets?

Answer 12

They form a net over cuts to catch escaping RBC, that helps form a clot.

Question 13

What is the function of plasma?

Answer 13

It carries all the blood cells, water, Gases, ammino acids, hormones that are in the blood stream.

Question 14

List 4 features of Arteries?

Answer 14

• Carry blood away from the heart
• Carry mainly oxygenated blood
• Have thick elasticated walls
• Smaller lumen

Question 15

What is Interstitial or Tissue fluid?

Answer 15

• Fluid which lies between the capillary and the tissue receiving the nutrients or releasing waste.
• It is made of plasma which has been forced out of the capillary by hydrostatic pressure.
• It contains, water, O₂ and CO₂, nutrients, waste.

Question 16

List the features of Veins

Answer 16

• Carries blood back to the heart
• Much less smooth muscle
• has a biger lumen
• The pressure is lower
• contains semi lunar values

Question 17

What is the hydrostatic pressure in mmHg leaving the cappilaries?

Answer 17

32 mmHg

Question 18

What is the osmatic pressure retuning to the venules from the tissue fluid?

Answer 18

12 mmHg

Question 19

What veins and arteries look after the Kidneys?

Answer 19

Renal vein & renal Artery

Question 20

What vein and artery looks after blood flow to and from the Liver?

Answer 20

Hepatic vein and Hepatic artery

Question 21

what does histamine do?

Answer 21

Makes they capillaries more permiable to allo the larger WBC and proteins through to attack pathogens.

Question 22

Explaine why veins migt be considered an organ?

Answer 22

Veins are made of the same material and carry out a similar function

Question 23

How do you convert um into mm?

How do you convert mm into um?

Answer 23

Divide by 1000

Multiply by 1000