- published: 17 Sep 2016
- views: 42222
The cell (from Latin cella, meaning "small room") is the basic structural, functional, and biological unit of all known living organisms. A cell is the smallest unit of life that can replicate independently, and cells are often called the "building blocks of life". The study of cells is called cell biology.
Cells consist of cytoplasm enclosed within a membrane, which contains many biomolecules such as proteins and nucleic acids. Organisms can be classified as unicellular (consisting of a single cell; including bacteria) or multicellular (including plants and animals). While the number of cells in plants and animals varies from species to species, humans contain more than 10 trillion (1013) cells. Most plant and animal cells are visible only under the microscope, with dimensions between 1 and 100 micrometres.
The cell was discovered by Robert Hooke in 1665, who named the biological unit for its resemblance to cells inhabited by Christian monks in a monastery.Cell theory, first developed in 1839 by Matthias Jakob Schleiden and Theodor Schwann, states that all organisms are composed of one or more cells, that cells are the fundamental unit of structure and function in all living organisms, that all cells come from preexisting cells, and that all cells contain the hereditary information necessary for regulating cell functions and for transmitting information to the next generation of cells. Cells emerged on Earth at least 3.5 billion years ago.
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Hank tells us about the city of Eukaryopolis - the animal cell that is responsible for all the cool things that happen in our bodies. Crash Course Biology is now available on DVD! http://dftba.com/product/1av/CrashCourse-Biology-The-Complete-Series-DVD-Set Like SciShow on Facebook: http://www.facebook.com/scishow Follow SciShow on Twitter: http://www.twitter.com/scishow More info. on the structures described in this video linked to in the Google Document here: http://dft.ba/-1TR_ Table of Contents time codes 1) Robert Hooke 1:59 2) Cilia/Flagella 2:52 3) Cell Membrane 3:32 4) Cytoplasm/Cytoskeleton/Centrosomes 3:58 5) Endoplasmic Reticulum 4:41 6) Ribosomes 5:45 7) Golgi Apparatus 6:00 8) Lysosomes 6:47 9) Nucleus 7:06 10) Mitochondria 9:14 TAGS: crashcourse, biology, animal cells, ce...
You will learn about "Animal Cell" in this video. The animal cell is surrounded by a flexible cell membrane that encloses all the contents of the cell. It is semi- permeable, i.e. it allows only specific materials to move in and out of the cell. The different parts of the cell are called organelles. The animal cell has a jelly like substance called cytoplasm that provides a surface for all organelles. The nucleus is the control centre of the cell. It decides and controls most of the functions going on in the cell. The mitochondria are the sites for cellular respiration in the cell. They are known as the powerhouses of the cell as they release energy rich compounds called ATP, which are needed for the functioning, growth and maintenance of the body. The endoplasmic reticulum is a large ...
This rap was created for a 6th-grade science classroom to teach about the different parts of a cell. With its catchy rhythm and rhymes, students of all learning styles and abilities will be able to learn about cells and their functions while having fun! Visit my Bandcamp Page to Purchase Cells Cells: https://crappyteacher.bandcamp.com Follow me on Twitter: @crapnellscience Follow me on Instagram: @crapnellscience "Cells, Cells" Original Rap by Ms. Quitmeyer- Legal name now changed to: Emily Crapnell Today's the day were gonna learn about the cell If I teach it okay, you'll know it very well So listen up 6th graders- -no room left for haters- lets talk about the building blocks of life- cells that make us. Chorus: Cells, cells they're made of organelles Try to pull a fast one, the cyto...
Buckle up for a prokaryote and eukaryote comparison before taking a ride into a cell to explore organelle structures and functions! This cell introduction also includes the modern cell theory.
Project Name: e-Content for undergraduate students of science in graduate programmes Project Investigator: Dr. Mandira Sikdar Module Name: Introduction to cells
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มีคำหนึ่งคำที่อยู่ข้างในใจ อยากจะบอกตั้งแต่วันที่เธอนั้นบอก ว่าเจ้าต้องการจะจากไปต้องการมีใคร ที่ดีกว่านี้ * ได้แต่มองภาพเจ้านั้นเดินจากไปจนลับตา บ่ อาจห้ามน้ำตา จางๆที่มันจะรินไหล ** แม้ในใจ ลึกๆ มันจะเจ็บ ใจ ลึกๆ มันจะปวด ความฮู้สึก ลึกๆนั้นมันอยาก จะนั่งลงคุกเข่า อ้อนวอนให้เจ้านั้นจงอย่าไป เท่านี้เพียงอยากบอกแต่ต้องเก็บไว้ มันบ่ฮู้จะห้ามอย่างใด จะบอกอย่างใด เมื่อเจ้าหมดใจ ถึงจะดึงเธอไว้ เจ้าก็คงต้องไป เมื่อเจ้านั้นหมดใจ จะห้ามก็บ่ไหว ถึงจะมีน้ำตา หรือจะกอดขาไว้ จะอ้อนวอนไปเท่าไร เจ้าก็คงบ่ใส่ใจ (*,**,**) มีคำหนึ่งคำที่อยู่ข้างในใจ อยากจะบอก ตั้งแต่วันที่เจ้านั้นบอก ว่าเจ้าต้องการจะจากไป อยากให้ฟังเอาไว้.......อย่าไป
Paul Andersen takes you on a tour of the cell. He starts by explaining the difference between prokaryotic and eukaryotic cells. He also explains why cells are small but not infinitely small. He also explains how the organelles work together in a similar fashion. Do you speak another language? Help me translate my videos: http://www.bozemanscience.com/translations/ Intro Music Atribution Title: I4dsong_loop_main.wav Artist: CosmicD Link to sound: http://www.freesound.org/people/CosmicD/sounds/72556/ Creative Commons Atribution License
Look at the cells
Watch them grow
Dividing so fast
How much do they know ?
[Refrain]
It's just a little piece of me and you
It's easy
Just a little piece of me and you
It's easy
DNA do not alter
Building your son or daughter
[Refrain]
Look at the cells
Taking form
Amphibian child
You have born
[Refrain]
Hands, heart, brain, eyes that will see
Infinite complexity