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Blood and Circulation 1. Blood is certainly thicker than water. It has four major functions and so has four main components. Complete the following sentences: 2. Blood is circulated around the body in three sorts of tubes. Complete the following table. A__________

V________

C_____________

By definition these always carry blood away from the heart. They are thick walled to cope with the p___________ caused by the h___________.

By definition these always carry blood toward the heart. They are thin walled because they do not have to cope with the p__________ caused by the h_________. Tiny v________ keep the blood flowing in the correct direction

These very fine tubes go past nearly every cell in the body so that o____________ gas, gl__________ and a__________ a_________ can be delivered and c_____________ d_____________ gas taken away.

Arteries always carry Oxygenated blood (red). The exception to this is the P__________ Artery.

Veins always carry De-oxygenated blood (blue). The exception to this is the P__________ Vein.

R_____ blood cells- Carry o__________ from the lungs around the body as oxygenated blood. They give up the o________ to cells that have used their oxygen to release e_________ from g_________ in r_________________. The blood becomes deoxygenated. The c______ d____________ gas that is produced in r_____________ is also carried back to the lungs and turns the red blood into the familiar b______ colour of v________.

P__________ is a clear liquid into which the small food units pass by d________. The g___________ and a________ a_________ are transported to where ever they are required. Wastes are also transported back to the kidneys in the p_______.

W________ blood cells- these seek out and destroy foreign bodies. Invading germs are killed and eaten making pus.

P__________ enable blood to c_____ and stop leaking out when damage occurs. When damaged make a fine fibre that acts as a fishing net and catches the red blood cells in it forming a scab.

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The Human Heart Life enabling blood is pumped around your body by the heart. It travels through lots of tubes-veins, arteries and capillaries. 1. Label the 4 chambers, major veins and arteries of this diagram of the human heart.

3. The vessels and chambers of the heart below are numbered. Which of the following sequences is correct for showing the path of blood from the time it comes into the heart to the time it goes out again? Option ________

V________ C________

L________ A________

P________ V________

A________

R________ A________

R________ V________ L________

V________

P________ A________

V________ that keep blood flowing in the correct direction

The heart is a double pump. You have noticed that it is labelled as though it was inside your chest so the right v__________ is drawn on the L_____ hand side of the diagram. Blood with a high concentration of c____________ d____________ in it coloured b_______ enters the R_________ A_________ and travels into the R___________ V____________ . The heart muscle contracts and the deoxygenated b________ coloured blood is pumped into the lungs where the carbon dioxide made during cell r____________ diffuses out of the blood. O____________ diffuses into the blood turning it red as the R______ b_________ cells pick up the o______________. The now oxygenated r______ coloured blood travels through the pulmonary v________ into the L______ A_______. The red oxygenated blood is then pumped by the strongest chamber in the heart out through the A________ and around the body.

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Definitions Practice In the space beside each of the words in the following list, select a definition from the list below and write it out.

artery

Pulmonary Vein

Vena Cava

Right Ventricle

Left Atrium

Right Atrium

Vein

Oxygenated

Capillaries

Left Ventricle

Red blood cells

Heart

Aorta

White blood cells

Definitions  List  a The type of blood vessel that carries blood away from the heart. b The name of the blood vessel that carries blood back to the Right Atrium. c The name of the smallest blood vessels. d The name of the blood vessel which carries blood to the Left Atrium. e The type of vessel which carries blood back to the heart. f The organ which pumps blood. g The chamber which pumps blood around the body. h The type of cell in the blood that seeks out and destroys invading germs that would cause

sickness. (Form pus) i The name of the vessel which carries blood away from the Left Ventricle. j The term describing blood which has just passed through the lungs. k The name of the l The cell in blood that carry oxygen to cells that are respiring.