Unit 9 : Transport in Animals

Question 1

Define Circulatory System

Answer 1

a system of tubes (veins, capillaries, arteries) with a pump (heart) and valves (in heart and veins) to ensure a one-way flow of blood

Question 2

5 Features of a Single Circulation System {Fish}

Answer 2

1. blood flows through the heart once every complete circuit
2. two heart chambers (atrium and ventricle)
3. blood absorbs oxygen in the gills in lower - pressure
4. blood is released in body cells, then back to the heart
5. gill capillaries slow blood flow, body receives blood at a very low pressure which decreases the rate of oxygen supply

Question 3

Structure of a Single Circulation System {Fish}

Answer 3

body → the atrium → the ventricle → gills → rest of body

Question 4

5 Features of a Double Circulation system