question edit history translations

What is the shape do erythrocytes in human blood?

Oval convex discs

One-sided convex disc

Oval biconcave disks

Sphere

In humans, mature red blood cells are flexible and oval biconcave discs. They lack a cell nucleus and most organelles, in order to accommodate maximum space for hemoglobin; they can be viewed as sacks of hemoglobin, with a plasma membrane as the sack. Approximately 2.4 million new erythrocytes are produced per second in human adults.

Ts

3

emiliano marocchi wikipedia → Red blood cell

bloodbodygeometryhuman anatomymedicine

Blood quiz Geometry quiz Human anatomy quiz

You will play as

Answers by country

Pakistan

4%

9%

79%

4%

62

Nigeria

9%

6%

75%

9%

32

the Netherlands

19%

0%

74%

6%

31

Switzerland

13%

6%

68%

11%

61

Greece

17%

10%

65%

6%

29

Italy

6%

22%

61%

9%

31

France

19%

9%

61%

9%

21

India

16%

12%

59%

11%

325

Poland

16%

17%

58%

8%

11217

Austria

15%

19%

56%

9%

110

Germany

18%

18%

54%

7%

583

the United Kingdom

23%

16%

48%

10%

284

the United States

22%

13%

47%

13%

482

Australia

24%

19%

42%

12%

57

Republic of Ireland

30%

14%

41%

14%

56

the Philippines

22%

27%

39%

9%

61

Norway

27%

22%

36%

9%

22

Canada

23%

20%

30%

21%

65

Belgium

25%

40%

30%

5%

20

Denmark

33%

22%

22%

11%

18

Which direction is not possible to point at when standing at the South Pole?

neither east, west, nor south

What is the maximum distance a plane can fly travelling constantly North?

It can fly endlessly (as long it can)

How many edges does a Möbius strip have?

How many countries were bordering Poland at the outbreak of World War II in 1939 ?