circulatory system

Question 1

circulatory system

Answer 1

the system that carries matierials around the body it consists of the heart, blood and blood vessels

Question 2

structure of the arteries

Answer 2

arteries have thick muscular walls to tolerate pressure from the heart pumping

Question 3

function of the arteries

Answer 3

to carry blood away from the heart

Question 4

structure of the capillaries

Answer 4

very thin, one cell thick blood vessels , just wide enough for red blood cells

Question 5

structure of the veins

Answer 5

thin muscular walls contain valves to stop the backflow of blood

Question 6

function of the veins

Answer 6

to carry blood to the heart

Question 7

which blood vessel carries oxygen rich blood to the heart

Answer 7

pulmonary vein

Question 8

what chamber of the heart does oxygen rich blood coming from the lungs go into

Answer 8

left atrium

Question 9

what does the aorta do?

Answer 9

the aorta carries oxygen rich blood t the rest of the body

Question 10

what blood vessel does carbon-dioxide rich blood leave the heart for the lungs through

Answer 10

pulmonary artery

Question 11

carbon-rich blood enters the heart through the…

Answer 11

vena cava

Question 12

why is the heart called a double system

Answer 12

the right side pumps blood to the lungs and the left side pups blood to the body (cells), they pump simultaneously

Question 13

what does blood do?

Answer 13

blood carries oxygen, glucose, carbon-dioxide, nutrients and waste to and from cells

Question 14

red blood cells

Answer 14

contain haemoglobin and carry oxygen

Question 15

white blood cells

Answer 15

are part of the immune system and fight disease

Question 16

platelets

Answer 16

broken bits of cells that help with blood clotting to stop blood loss

Question 17

plasma

Answer 17

yellowish liquid, 90% water. carries oxygen, nutrients and dissolved chemicals e.g calcium, potassium, nitrate

Question 18

cardiac muscle

Answer 18

the heart is made up of special muscles that work continously and don’t tire, called cardiac muscles

Question 19

what are the three main functions of the circulatory system?

Answer 19

1. carries nutrients and oxygen to your cells so that respiration can happen
2. removes carbon from the cells taking it to the lungs to be exhaled
   3.transports waste and other products to where they can be disposed of

Question 20

what does the circulatory system consist of?

Answer 20

your heart, blood vessels and blood

Question 21

describe the structure of the heart

Answer 21

the heart is made up of four chamber separated by muscular wall called the septum

Question 22

how is the right side of the heart different to left side

Answer 22

the right side of the heart pumps blood to the lungs and the left side pumps blood to the body cells

Question 23

what occurs when blood passes by the alveoli

Answer 23

the transfer of carbon-dioxide for oxygen in the blood through diffusion

Question 24

why are the alveoli suited to gas exchange?

Question 25

haemoglobin

Answer 25

the pigment that gives red blood cells their colour