2.5 Structure&Function Artery, Veins,Capillary

Question 1

Cardiovascular system allows exchanges of substances through which type of blood vessel?

Answer 1

Capillaries

Question 2

Arteries function

Answer 2

Carry blood away from heart and supply oxygenated blood

Question 3

Wjat do veins do?

Answer 3

Supply deoxygenated blood back to heart with high blood pressure

Question 4

What is Pulmonary System?

Answer 4

Circulates blood from heart to lungs and back to the heart

Question 5

What exertions are there to pulmonary system?

Answer 5

Pulmonary artery carries deoxygenated blood and veins carry oxygenated

Question 6

How is hepatic portal vein different from other veins?

Answer 6

It carries blood to capillary bed of the intestine then to the capillary bed of the liver.
Veins usually carry blood from capillary bed in a organ directly back to heart

Question 7

Structure of an artery

Answer 7

Thick middle layer of smooth muscle in its wall, inner and outer layer of elastic fibres which allow the wall to pulsate and has a narrow lumen

Question 8

Structure of veins

Answer 8

Muscular layer and layers of elastic fibres in wall of vein are thinner, wider lumen , valves present

Question 9

Structure of capillaries

Answer 9

Thin walls, composed of epithelium and only one cell thick

Question 10

What is vasoconstriction?

Answer 10

Reduces blood flow

Question 11

What is vasodilation

Answer 11

Increases blood flow

Question 12

What does blood consist of?

Answer 12

Red blood cell carry O2
White fight infection
Platelets clot blood & are in plasma which is a yellow fluid that contains glucose and amino acids and plasma proteins

Question 13

What is different from Tissue fluid and blood plasma?

Answer 13

Tissue fluid contains little or no protein as when blood is forced into capillaries pressure filtration occurs and much of the plasma squeezed out through thin capillary walls

Question 14

Tissue fluid has a high concentration of soluble food molecules dissolved oxygen and useful ions

Answer 14

Diffuse down a concentration gradient

CO2 and other metabolic wastes diffuse out of cell into tissue fluid to be excreted

Question 15

What happens during osmotic return of tissue fluid

Answer 15

Processes brought about by osmosis tissue fluid returned to blood in the capillaries at the venule side of the capillary bed

Question 16

What happens during lymphatic return of tissue fluid?

Answer 16

Excess tissue fluid is absorbed by thin walled lymphatic vessels located in a connective-tissue among living cells. Once in a lymphatic vessel the tissue fluid is called lymph

Question 17

How is flow of lymph in lymphatic system brought about?

Answer 17

Brought about mainly by the vessels being periodically compressed when muscles contract during breathing locomotion and other body movements.
lymph vessels eventually return the contents via two lymphatic duct which enter the veins coming from the arms