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):
1

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

blood

2

Blood is pumped from the heart to the

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

3

Two chambers called the

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

4

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

pulmonary arteries.

5

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

aorta

6

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

coronary arteries

7

two chambers called the left and right

atrium receive blood into the heart from veins

8

Veins bringing blood to the heart from the lungs are the

pulmonary veins

9

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

vena cava before entering the heart

10

Arteries carry blood

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

11

Blood in arteries is

under high pressure

12

Veins carry blood

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

13

Blood in veins is under

lower pressure than blood in the arteries

14

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

valves

15

Within organs and tissues, blood is carried in networks of

capillaries.

16

Capillaries link the

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

17

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

material can be exchanged with tissues efficiently

18

Red blood cells are specialised because they have

haemoglobin, a red-oxygen carrying pigment.