Circulatory system Flashcards Preview

Science > Circulatory system > Flashcards

Flashcards in Circulatory system Deck (25):
1

erythrocytes

red blood cells

2

leucocytes

white blood cells

3

red blood cells

living cells in the blood that transport oxygen to all other living cells in the body

4

hemoglobin

the red pigment in red blood cells that carries oxygen

5

oxyhemoglobin

hemoglobin with oxygen molecules attached

6

white blood cells

living cells that fight bacteria and viruses as part of the human body’s immune system

7

platelets

small bodies involved in blood clotting. They are responsible for healing by clumping together around a wound.

8

circulatory system

the body system that circulates oxygen in the blood to all the cells of the body.

9

arteries

hollow tubes (vessels) with thick walls carrying blood pumped from the heart to other body parts

10

veins

blood vessels that carry blood back to the heart. They have valves and thinner walls than arteries.

11

capillaries

minute tubes carrying blood to body cells. Every cell of the body is supplied with blood through capillaries.

12

oxygenated blood

red blood that has been supplied with oxygen

13

deoxygenated blood

blood from which some oxygen has been removed

14

vena cava

large vein leading into the top right chamber of the heart

15

left atrium

upper left section of the heart where oxygenated blood from the lungs enters the heart

16

right atrium

upper right section of the heart where deoxygenated blood from the body enters

17

left ventricle

lower left section of the heart, which pumps oxygenated blood to all parts of the body

18

right ventricle

lower right section of the heart, which pumps deoxygenated blood to the lungs

19

valves

flap-like folds in the lining of a blood vessel or other hollow organ that allow a liquid, such as blood, to flow in one direction only

20

‘lub dub’

the sound made by the heart valves as they close

21

blood pressure

measures how strongly the blood is pumped through the body’s main arteries

22

systolic pressure

the higher blood pressure reading during contraction of the heart muscles

23

diastolic pressure

the lower blood pressure reading during relaxation of the heart muscles

24

heartbeat

contraction of the heart muscle occurring about 60–100 times per minute

25

pulse

alternating contraction and expansion of arteries due to the pumping of blood by the heart