Chapter 8-Transport Highways

Question 0

What are veins?

Answer 0

Blood vessels with thinner walls than arteries that carry blood to the heart. Valves on the walls prevent blood from flowing backwards.

Question 1

What are arteries?

Answer 1

Blood vessels with thick, elastic muscular walls that carry blood under high pressure away from the heart.

Question 2

What are capillaries?

Answer 2

Capillaries are the smallest blood vessels in the body. They penetrate almost every tissue carrying oxygen and nutrients to cells and remove waste such as carbon dioxide.

Question 3

How do kidneys remove waste?

Answer 3

Kidneys filter the blood and produce urine which contains unwanted substances. The ureter transports urine to the bladder. The urine exists the body when we urinate.

Question 4

How many chambers does a heart have? What are their names?

Answer 4

A heart has four chambers. The left and right atriums are the upper two chambers and the left and right ventricles are the lower two chambers.

Question 5

Why are the walls thicker and more muscular on the left side of the heart?

Answer 5

So they can force blood from the heart to the rest of the body.

Question 6

Describe the blood course on the right side of the heart

Answer 6

Used blood without oxygen enters the right side of the heart. The blood is bluish in colour. From there, blood is pumped to the lungs where it picks up oxygen and becomes reddish in colour.

Question 7

Describe the blood course on the left side of the heart.

Answer 7

Oxygenated blood returns o the left side if the heart to be pumped out to body tissues. It delivers oxygen and nutrients. Deoxygenated blood returns to the right side of the heart.

Question 8

True or false The heart has valve like structures attached to heart walls to prevent blood from flowing backwards.

Answer 8

True.

Question 9

Draw a diagram of heart

Answer 9

See study notes

Question 10

Draw a diagram of kidneys getting rid of waste

Answer 10

See study notes