Chapter 8 Transport In Mammals - Worksheet

Jurongville Secondary School Secondary 3 Express Biology Worksheet Chapter 8: Transport in Mammals

Name: _________________________( Class: 3____ 8.1

)

Date:__/___/___

Complete the following passage by filling in the blanks •

8.2

Blood, which is a fluid ________, carries out two important functions. It acts as a transport _________ carrying various substances from one part of the body to another. The _______ and red blood cells are the components involved in this work. Secondly, it ________ the body against ___________ microorganisms. The two main kinds of white blood cells, __________ and __________, are mainly involved with this work.

A blood cell A is on the point of entering the human heart on the right side. Trace the route it will take to reach the aorta by choosing the appropriate letters from Q to Z and arranging them in the correct order.

Q: Pulmonary vein R: Left ventricle S: Left atrium T: Right ventricle

(a)

U: Lung V: Right atrium W: Vena cava X: Hepatic artery

Y: Hepatic vein Z: Pulmonary artery

In mammalian circulatory system, blood passes through the heart ________ before it completes ________ __________ of the body. This is known as a __________ ___________. It is composed of the __________ circulation and the ___________ circulation.

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8.3

Trace the route of the blood cell A from the aorta to just outside the right side of the heart. Assume that this blood cell is present in the blood involved in the absorption of digested food. To show the route, choose the letters from Q to Z below that are applicable and arrange them in the correct order.

Q: Artery to intestine R: Hepatic vein S: Villus T: Lungs

U: Liver V: Vena cava W: Hepatic portal vein X: Pulmonary vein

Y: Pulmonary artery Z: Hepatic artery

8.4 The 3 types of blood vessels in the body are given in the box. Match (a) to (i) with the appropriate blood vessels. X: Arteries (a) (b) (c) (d) (e) (f) (g) (h) (i)

Y: Vein

Z: Capillaries

Blood loses volume One-cell thick walls Blood flows in pulses Valves present Blood flows under low pressure Very closely associated with body cells Carries blood to the heart Carries blood away from the heart Thick muscular walls

________ ________ ________ ________ ________ ________ ________ ________ ________

8.5

Answer the following questions in the spaces provided.

(a)

How is the blood flow brought about in the arteries different from that in the veins? ____________________________________________________ ____________________________________________________ (b)

You cut your skin and blood flows out. Explain what happens until a blood clot is formed. 2

__________________________________________________ __________________________________________________ __________________________________________________ __________________________________________________ __________________________________________________ __________________________________________________ __________________________________________________ (c)

The figure below shows the relationship between some body cells and the blood supply.

(i)

What are A, X and Y?

__________________________________________________ (ii)

What is R?

__________________________________________________ (iii)

What structural feature of A enables the formation of R? __________________________________________________ __________________________________________________ (iv)

How does the formation of R affect the blood in A?

__________________________________________________ 3

__________________________________________________ __________________________________________________

(v)

Why is R extremely important to body cells?

__________________________________________________ __________________________________________________ __________________________________________________ __________________________________________________ __________________________________________________ __________________________________________________

(vi)

What is S?

__________________________________________________ (vii)

How is S formed?

__________________________________________________ __________________________________________________ __________________________________________________ __________________________________________________

(viii)

How is the composition of blood coming from X different from that going to Y? __________________________________________________ __________________________________________________

(ix)

One of the components in the blood in A has an important transport function. What is this component and what does it transport?

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__________________________________________________ __________________________________________________

(d)

If bacteria invade the body cells shown, how would the blood “defend” them from the invaders? __________________________________________________ __________________________________________________ __________________________________________________ __________________________________________________

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