FEATURES OF A TRANSPORT SYSTEM Flashcards Preview

3 ADAPTIONS FOR TRANSPORT IN ANIMALS > FEATURES OF A TRANSPORT SYSTEM > Flashcards

Flashcards in FEATURES OF A TRANSPORT SYSTEM Deck (10):
1

transport systems in animals need... (3)

- a medium to carry materials
- a pump (e.g heart) for moving blood
- valves to maintain flow in one direction

2

some systems also have... (2)

- a respiratory pigment (increases volume of o2 carried)
- a network of branches to transport blood to all the tissues

3

open circulatory systems

- tissues bathed directly when blood is held in the haemocoel

4

describe an insects circulatory system? (4)

- open circulatory system
- long dorsal tube shaped heart running length of body
- pumps out blood at low pressure into haemocoel
- blood returns slowly to the heart and starts again

5

closed circulatory system

- blood moves in blood vessels

6

types of closed circulatory system (2)

- double
- single

7

single circulatory system

- blood moves around the heart once when it goes around the body

8

earthworm circulatory system (2)

- blood moves in dorsal vessel and back in ventral vessel
- five pairs of pseudohearts (thick, muscular blood vessels) pump blood from dorsal to ventral and keep it moving

9

fish circulatory system (2)

- ventricle pumps deoxygenated blood to gills where pressure falls
- oxygenated blood carried to tissues and deoxygenated blood returns to the heart

10

double circulatory system (7)

- passes through heart twice in circuit around the body
- blood is pumped by heart at high pressure
- rapid flow through blood vessels
- organs not in direct contact with blood but bathed in tissue fluid which seeps from capillaries
- blood pigment, haemoglobin, carries o2
- pressure reduced in lungs bc fragile but too low for body
- so blood returns to heart and pressure rises