Unicellular vs Multicellular | Cells | Biology | FuseSchool — Transcript

Full transcript

1. 0:04did you know that some organisms exist
2. 0:07of just one cell these simple organisms
3. 0:11like amoeba are unicellular they depend
4. 0:14on simple diffusion for life they're
5. 0:17usually too small to be visible with the
6. 0:19naked eye like bacteria and so we need a
7. 0:22microscope to see them but there are
8. 0:24some unicellular algae is there about 15
9. 0:27to 20 centimeters in size or other
10. 0:30organisms are multicellular they consist
11. 0:33of multiple cells and are more complex
12. 0:36the vast majority of plants and animals
13. 0:39are multicellular being multicellular
14. 0:42allows organisms to be larger and have
15. 0:44south differentiation the different
16. 0:48types of cells to carry out different
17. 0:50tasks groups of cells then function in
18. 0:53the same way to form tissues or organs
19. 0:56these specialized organs carry out our
20. 0:58life processes working together in
21. 1:01systems unicellular organisms can carry
22. 1:05out all life processes in just the one
23. 1:08cell using internal structures called
24. 1:12organelles the decreased ability to
25. 1:16share out life's processes means
26. 1:18unicellular organisms have a low level
27. 1:21of efficiency whereas multicellular
28. 1:24organisms are highly efficient with
29. 1:26division of labor at the cellular tissue
30. 1:29or organ system level unicellular
31. 1:32organisms cannot grow large because
32. 1:34they're limited by a surface area to
33. 1:37volume ratio whereas multicellular
34. 1:40organisms can increase the number of
35. 1:42small cells to give it a large size
36. 1:45overall multicellular organisms have
37. 1:49long lifespans because individual cells
38. 1:51have a relatively smooth workload
39. 1:54whereas the hard-working single cell of
40. 1:57a unison organisms has such a heavy
41. 2:00workload that it can only maintain a
42. 2:02very short lifespan I don't need to tell
43. 2:06you how we get nutrition
44. 2:08but how does a single cell manage it
45. 2:11usually by phagocytosis where the food
46. 2:14is engulfed and installed in food
47. 2:16vacuums inside the organism all
48. 2:20prokaryotes are unicellular eukaryotes
49. 2:23can be uni or multicellular organisms we
50. 2:27look at the difference between pro and
51. 2:29eukaryotes in this video and we'll
52. 2:32discover why the statement that that all
53. 2:34prokaryotes are unicellular is continued
54. 2:37by some scientists as well as
55. 2:40prokaryotes most protests and some fungi
56. 2:43like yeast are also unicellular so then
57. 2:46we have unicellular and multicellular
58. 2:48organisms final thought to leave you
59. 2:51with is that injury to the south of the
60. 2:53unicellular organism can cause death
61. 2:56then one cell is everything to them
62. 2:58whereas injury or death of some cells in
63. 3:01multicellular organisms shinnok was a
64. 3:03problem those cells can simply be
65. 3:05replaced if you liked the video give it
66. 3:07a thumbs up and don't forget to
67. 3:09subscribe comment below if you have any
68. 3:12questions why not check out our fuse
69. 3:14graph as well until next time