Chapter 2.6b The need for transport in animals: Circulation Flashcards Preview

FULL COURSE National 5 Biology > Chapter 2.6b The need for transport in animals: Circulation > Flashcards

Flashcards in Chapter 2.6b The need for transport in animals: Circulation Deck (18)
Loading flashcards...
1
Q

In mammals nutrients, oxygen and carbon dioxide are transported in the

A

blood

2
Q

Blood is pumped from the heart to the

A

lungs, then back to the heart before being pumped to all other parts of the body

3
Q

Two chambers called the

A

left and right ventricles pump blood out of the heart and into arteries.

4
Q

The arteries carrying blood away from the heart to the lungs are the

A

pulmonary arteries.

5
Q

The artery carrying blood away from the heart and which branches to all other parts of the body is the

A

aorta

6
Q

Branches of the aorta that supply the heart muscle itself with blood are the

A

coronary arteries

7
Q

two chambers called the left and right

A

atrium receive blood into the heart from veins

8
Q

Veins bringing blood to the heart from the lungs are the

A

pulmonary veins

9
Q

Veins bringing blood to the heart from all parts of the body join to form the

A

vena cava before entering the heart

10
Q

Arteries carry blood

A

away from the heart and have think, muscular walls and relatively narrow internal diameter.

11
Q

Blood in arteries is

A

under high pressure

12
Q

Veins carry blood

A

back to the heart and have thinner walls and relatively wider internal diameters than similar sized arteries

13
Q

Blood in veins is under

A

lower pressure than blood in the arteries

14
Q

To prevent the low-pressure blood from flowing back wards veins have

A

valves

15
Q

Within organs and tissues, blood is carried in networks of

A

capillaries.

16
Q

Capillaries link the

A

arteries supplying the organ or tissue with the veins which carry the blood away.

17
Q

Capillaries have thin walls and their networks produce a large surface area through which

A

material can be exchanged with tissues efficiently

18
Q

Red blood cells are specialised because they have

A

haemoglobin, a red-oxygen carrying pigment.