Year 8 ~ The human Body

Question 1

What components can be found in blood

Answer 1

Oxygen, platelets, white blood cells, plasma, haemoglobin, red blood cells

Question 2

describe them)

White blood cells are

Answer 2

Large and squishy when fighting a virus they engulf the bad cells and kill them

Question 3

What is good about platelets

Answer 3

Like oats they can clump together to form a clot and stop bleeding

Question 4

Where are red blood cells made

Answer 4

Inside bone marrow then they see pout through your porous bones into the bloodstream

Question 5

Oxygen binds to haemoglobin and red blood cells to form what

Answer 5

Oxyhaemoglobin

Question 6

What percentage of your blood is plasma

Answer 6

55%

Question 7

White blood cells destroy what

Answer 7

Pathogens and antigens which cause disease symptoms

Question 8

What was the percentage of your blood is red blood cells

Answer 8

44%

Question 9

Plasma…

Answer 9

Contains water and is made in the liver

Question 10

What percentage of your blood is white blood cells and platelets

Answer 10

1%

Question 11

Why do we need a circulatory system

Answer 11

We need a circulatory system because it delivers oxygen around the body to the organs which require that to operate and they perform basic functions we need to survive

Question 12

What does the heart consist of

Answer 12

The heart consists of a pump (the heart) blood vessels and blood

Question 13

Blood goes from the heart to where?

Answer 13

The lungs

Question 14

What does the right side of the heart do

Answer 14

pushes blood to the lungs

Question 15

what does the left side of the heart do

Answer 15

pushes blood to all organs in the body except the lungs

Question 16

why does the left side of the heart have a thicker muscle wall?

Answer 16

the left side of the heat has a thicker muscle wall because it has to pump blood all around the body which requires a greater force

Question 17

what are heart chambers called?

Answer 17

ventricles

Question 18

why are heart valves important?

Answer 18

because the make sure blood doesnt go backwards

Question 19

what sets the rhythm of the beating in the heart and when?

Answer 19

a pacemaker sets the beating of the heart and is formed about 6 weeks after the ovum is fertilised

Question 20

what do blood vessels do ?

Answer 20

blood vessels carry the blood around the body to each organ and take it back to the heart

Question 21

what gas diffuses into the cells from the bloodstream

Answer 21

carbon dioxide

Question 22

what diffuses out from the cells in blood ?

Answer 22

Oxygen and Glucose

Why? because this seepsout to the organs, which need oxygen and glucuose

Question 23

arteries carry blood ______ from the _______.

Answer 23

Away, heart

Question 24

What are the names and functions of the major organs in humans?

Answer 24

Heart - pump blood around the body
Lungs - give oxygen to your blood for the organs
Liver: Processes nutrients, breaks down bad stuff, and produces bile for digestion.
Kidneys: Filter blood to produce urine, regulate fluid balance and electrolytes.
Brain - control your bodys fuctions

Question 25

What are organs made from?

Answer 25

tissues

Question 26

Describe the functions of the skeleton

Answer 26

To hold the body up and protect the organs

Question 27

Name and locate some of the major bones in the human body.

Answer 27

femur - thigh bone patella - knee cap phalanges - toe bones

Question 28

What are bones moved by?

Answer 28

muscles

Question 29

What are bones joined together by?

Answer 29

ligaments

Question 30

How are muscles connected to bones?

Answer 30

tendons

Question 31

Describe the differences between different types of joint

Answer 31

they all move differently; in different directions or not at all

Question 32

give examples of and describe each type of joint

Answer 32

Fixed - no movement - eg. skull plates Cartilaginous - Allows some flexibility - eg. spine Synovial - Allows different types of movement and there are different types... pivot - allows twisting but not bending - eg. neck ball and socket - movement in almost any direction - eg. shoulder hinge - folding - eg. knee condyloid - can be flexed or extended - eg. wrist

Question 33

Explain how muscles that form antagonistic pairs work together when bones move.

Answer 33

one contracts and the other one extends to form movement

Question 34

Name the components of blood

Answer 34

WBC, RBC, platelets, plasma, haemoglobin, (oxygen)

Question 35

functions of RBC

Answer 35

carry oxygen

Question 36

Functions of WBC

Answer 36

when fighting a virus they engulf (phagocytes) or destroy (lymphocytes) antigens

Question 37

functons of platelets

Answer 37

can clump together and stop bleeding and form a scab

Question 38

functions of plasma

Answer 38

cells put waste in the plasma which removes it

Question 39

haemoglobin + oxygen =

Answer 39

oxyhaemoglobin

Question 40

Describe the role of the circulatory system: identify and describe the functions of the main parts; compare the properties of arteries, veins and capillaries.

Answer 40

say it out loud

Question 41

the heart acts as a ____ ____ to ensure that blood flows in ___ direction(s)

Answer 41

double pump, one

Question 42

Describe the role of the breathing system: identify and describe the functions of its parts.

Answer 42

out loud

Question 43

Describe the gas exchange process, and compare the compositions of inhaled and exhaled air.

Question 44

Describe how microbes can be transmitted between people and how this can be prevented.

Answer 44

contact - not touching a sick person too mmuch through cuts - cover the wound inhalation - when sick, cover our mouth when you couhg or sneze

Question 45

Explain how our body’s defences work, including the roles of ciliated epithelial cells, mucus, white blood cells and antibodies.

Answer 45

write or say

Question 46

Describe the formation of antibodies and how their presence prevents further occurrences of the same disease.

Answer 46

..

Question 47

Recall an example of the body killing microbes, and describe the roles of ciliated epithelial cells, mucus, white blood cells and antibodies.

Question 48

meh i give up