Biology - 4BI1 PearsonEdexcel

Level Of Organisation

Gbogbo ọrọ náà

A single heart cell cannot pump blood around the body on its own. Thousands of cardiac muscle cells, working together as a tissue, contract in rhythm. Those tissues combine into the heart organ, which forms part of the circulatory system. This layered arrangement, from the smallest organelle to the largest organ system, is how complex organisms achieve things no single cell could manage alone.

In this lesson you will learn the five levels of organisation in multicellular organisms: organelles, cells, tissues, organs and organ systems. You will explore examples from both animals and plants and practise identifying each level in diagrams.

Ebumnobi

  1. Describe the levels of organisation in organisms: organelles, cells, tissues, organs and systems

Maapụ uche

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Akwụkwọ Ọmụmụ

Unicellular organisms carry out every life process within a single cell. Multicellular organisms take a different approach: their cells specialise and work together at increasing levels of complexity. Understanding these levels helps you see how a whole organism functions as an integrated unit.

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Nnyocha Ọmụmụ

Ekele diri gi maka imecha ihe karịrị na Level Of Organisation. Ugbu a na ị na-enyochakwa isi echiche na echiche ndị dị mkpa, ọ bụ oge iji nwalee ihe ị ma. Ngwa a na-enye ụdị ajụjụ ọmụmụ dị iche iche emebere iji kwado nghọta gị wee nyere gị aka ịmata otú ị ghọtara ihe ndị a kụziri.

Ị ga-ahụ ngwakọta nke ụdị ajụjụ dị iche iche, gụnyere ajụjụ chọrọ ịhọrọ otu n’ime ọtụtụ azịza, ajụjụ chọrọ mkpirisi azịza, na ajụjụ ede ede. A na-arụpụta ajụjụ ọ bụla nke ọma iji nwalee akụkụ dị iche iche nke ihe ọmụma gị na nkà nke ịtụgharị uche.

Jiri akụkụ a nke nyocha ka ohere iji kụziere ihe ị matara banyere isiokwu ahụ ma chọpụta ebe ọ bụla ị nwere ike ịchọ ọmụmụ ihe ọzọ. Ekwela ka nsogbu ọ bụla ị na-eche ihu mee ka ị daa mba; kama, lee ha anya dị ka ohere maka ịzụlite onwe gị na imeziwanye.

  1. Which of the following correctly lists the levels of organisation from smallest to largest? A) Cell, organelle, tissue, organ, organ system B) Organelle, cell, tissue, organ, organ system C) Organelle, tissue, cell, organ, organ system D) Cell, tissue, organelle, organ system, organ Answer: B
  2. A group of similar cells working together to perform the same function is called: A) An organ B) An organism C) A tissue D) An organ system Answer: C
  3. Which of the following is an example of an organ? A) A single muscle cell B) The lungs C) A mitochondrion D) Epithelial tissue Answer: B
  4. The circulatory system is an example of: A) A tissue B) An organ C) An organ system D) A cell Answer: C
  5. Which organelle is the site of aerobic respiration? A) Nucleus B) Ribosome C) Chloroplast D) Mitochondrion Answer: D

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