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Biology - Chapter 8 > Transport in animals > Flashcards

Flashcards in Transport in animals Deck (27)
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1

What does it mean for animals increasing in size?

Their diffusion pathway is larger

2

Which animals have a better SA:V ratio?

Large animals have a smaller SA:V ratio (similar in numbers)

3

Why do larger animals need more O2 the small animals?

More active, more cells in body, more waste

4

What are the three blood vessels?

Arteries, veins, capillaries

5

What do arteries do?

Carry blood at high pressure away from heart to entire body

6

What are arteries made up of?

Lumen, Tunica intima (made of endothelium, smooth inside), tunica media (elastic), tunica external (tough collagen)

7

What do capillaries do?

Exchange materials with cells

8

Structure of capillaries?

Small lumen (slow down blood flow), one cell thick wall (ideal for diffusion)

9

What are venules?

Small veins, made of endothelium

10

What do veins do?

Returns blood to the heart at low pressure

11

Structure of veins?

Large lumen and valves do avoid back flow, thin wall

12

What are erythrocytes?

Red blood cells

13

What are leukocytes?

White blood cells

14

What are platelets?

Cell fragments (involved in clotting)

15

What is plasma?

Where dissolved substances are transported

16

What is tissue fluid?

Formed from plasma and contains many solutes and WBC

17

What is mass flow?

Directed movement of materials, some type of force causing it

18

What is the main blood vessel in insects?

The dorsal vessel

19

What is the blood inside insects called?

Haemolymph

20

What is the body cavity of insects called?

Haemocoel

21

What name is given to an insects heart?

Tubular heart

22

What are the Ostia?

One way valves in the heart to let blood back in

23

What are the four main parts of the heart and where are they?

Ventricles at the bottom, atria at the top, left ventricle/atrium on the right hand side and right ventricle/atrium on the left hand side

24

What is the septum?

The bottom tissues of the heart, also goes separates the two sides

25

Where are the valve tendons located?

In the top of the ventricles

26

Which half of the heart carries oxygenated blood?

Left

27

Which half of the heart carries deoxygenated blood?

Right