organsing animals and plants

Question 1

What are the 4 main components of blood?

Answer 1

• red blood cells
• white blood cells
• platelets
• plasma

Question 2

What do red blood cells contain?

Answer 2

haemoglobin binds to oxygen to transport it from the lungs to the tissues.

Question 3

What do platelets do?

Answer 3

cell fragements that start the clotting process at wound size

Question 4

What do the white blood cells do?

Answer 4

help to protect the body against infection.

Question 5

What are the 3 main types of blood vessels that blood is carried around from?

Answer 5

-arteries
- veins
- capillaries

Question 6

What do our arteries do?

Answer 6

carry blood away from our heart to the organs of your body

Question 7

What do our veins do?

Answer 7

carry blood away from the organs towards your heart.

Question 8

What do the capillaries do?

Answer 8

enables substances to diffuse easily out of your blood and into your cells

Question 9

What do valves do?

Answer 9

prevent backflow and ensure that blood flows in the right direction.

Question 10

Why do humans have a double curcularatory system?

Answer 10

one system carries blood from your heart to your lungs.
the other transport system carries blood from your heart to all the other organs in your body.

Question 11

What does the heart do?

Answer 11

organ that pumps blood around the body

Question 12

What can stents be used to do?

Answer 12

used to keep narrowed or blocked arteries open

Question 13

What do statins do?

Answer 13

reduce cholestrol levels in the blood and recuce the ridk of coronary heart disease

Question 14

What are artificial pacemakers?

Answer 14

eletrical devices used to correct irregularaties in the heart rhythm.

Question 15

What are artificila hearts?

Answer 15

devicethat that is,
used to keep patients alive while they wait for a transplant
OR
for their heart to rest as am aid to recovery

Question 16

What is a mechanical valve?

Answer 16

made from carbon and metal to control the normal flow of blood into and out of the heart.

Question 17

what is an animal valve?

Answer 17

composed from animal or human tissue to help thin blood vessles

Question 18

cons of mechanical valves?

Answer 18

• ## increased risk of blood clots (lead to heartattack)

Question 19

cons of animal valves?

Answer 19

• bleeding side effects of warafarin

Question 20

Why is the left side of the heart thicker?

Answer 20

works at a higher pressure and pumps blood to the whole body

Question 21

What does the pholem tissues do?

Answer 21

pholem tissue transports dissolved sugars from the leave to the rest of the plant.

Question 22

What do the xylem tissues do?

Answer 22

transports water and mineral ions from the roots to the stem and leaves.

Question 23

What are plant tissues?

Answer 23

collections of cells specialised to carry out specific functions.

Question 24

What is the gas exchange system?

Answer 24

absorbing oxygen into the blood and removing carbon dioxide from the blood.

Question 25

What is the gas exchange system?

Answer 25

absorbing oxygen into the blood and removing carbon dioxide from the blood.

Question 26

What does the alveoli do?

Answer 26

provides a very large surface area and a rich supply of blood capillaries.

(meaning gases can diffuse into and out of blood as efficiently as possible)

Question 27

How are xylem cells strengthened?

Answer 27

by lignin

Question 28

What is the process of moving ffood substances in the pholem?

Answer 28

translocation

Question 29

What is the epidermal tissue?

Answer 29

tissue that is covered with a waxy cuticle to prevent water loss from the leaf

Question 30

What is the upper eperdermis?

Answer 30

transparent and very thin to allow light to pass through into the palisade layer

Question 31

what does the palisade mesophyll do?

Answer 31

has lots of chloroplasts to absorb light for photosynthesis

Question 32

What does the spongy mesophyll do?

Answer 32

air spaces which provide space for gases to diffuse in and out of the cell.