Skip to main content

Cell components

cell membrane -
the thin layer of protein and fat that surrounds the cell.
...
centrosome -
a small body located near the nucleus - it has a dense center and radiating tubules. This is where microtubules are made. During cell division (mitosis), the centrosome divides and the two parts move to opposite sides of the dividing cell.
...
cytoplasm -
the jellylike material outside the cell nucleus in which the organelles are located.
...
Golgi body -
(also called the Golgi apparatus or Golgi complex) a flattened, layered, sac-like organelle that looks like a stack of pancakes and is located near the nucleus. It produces the membranes that surround the lysosomes. The Golgi body packages proteins and carbohydrates into membrane-bound vesicles for "export" from the cell.
...
lysosome -
(also called cell vesicles) round organelles surrounded by a membrane and containing digestive enzymes. This is where the digestion of cell nutrients takes place.
...
mitochondrion -
spherical to rod-shaped organelles with a double membrane. The inner membrane is infolded many times, forming a series of projections (called cristae). The mitochondrion converts the energy stored in glucose into ATP (adenosine triphosphate) for the cell.
...
nuclear membrane -
the membrane that surrounds the nucleus.
...
nucleolus -
an organelle within the nucleus - it is where ribosomal RNA is produced. Some cells have more than one nucleolus.
...
nucleus -
spherical body containing many organelles, including the nucleolus. The nucleus controls many of the functions of the cell (by controlling protein synthesis) and contains DNA (in chromosomes)
...
ribosome -
small organelles composed of RNA-rich cytoplasmic granules that are sites of protein synthesis.
...
rough endoplasmic reticulum - (rough ER)
a vast system of interconnected, membranous, infolded and convoluted sacks that are located in the cell's cytoplasm (the ER is continuous with the outer nuclear membrane). Rough ER is covered with ribosomes that give it a rough appearance. Rough ER transports materials through the cell and produces proteins in sacks called cisternae (which are sent to the Golgi body, or inserted into the cell membrane).
...
smooth endoplasmic reticulum - (smooth ER)
a vast system of interconnected, membranous, infolded and convoluted tubes that are located in the cell's cytoplasm (the ER is continuous with the outer nuclear membrane). The space within the ER is called the ER lumen. Smooth ER transports materials through the cell. It contains enzymes and produces and digests lipids (fats) and membrane proteins; smooth ER buds off from rough ER, moving the newly-made proteins and lipids to the Golgi body, lysosomes, and membranes.
...
vacuole -
fluid-filled, membrane-surrounded cavities inside a cell. The vacuole fills with food being digested and waste material that is on its way out of the cell.
...
Adopted from: http://www.enchantedlearning.com/subjects/animals/cell/jello/
Labels:

Comments

Post a Comment


Free Educational Website For All

Popular posts from this blog

Buruj mudahkan pengenalan bintang di langit

Terdapat 88 sistem buruj di langit. Buruj sebenarnya adalah titik-titik bintang yang dikumpul dan dibahagikan serta diberikan nama-nama tertentu berdasarkan bentuk supaya mudah diingat. Ini merupakan cara sistem buruj mula terbentuk. Justeru, buruj ini sebenarnya bukanlah satu perkara yang benar. Ia sebenar adalah lambang khayalan ahli-ahli syair, petani dan juga astronomi lebih 6,000 tahun lalu. Tujuan sebenar penciptaan buruj ini adalah bagi membantu kita mengenal pasti jutaan bintang di langit. Semasa langit gelap, anda boleh melihat lebih kurang 1,000 hingga 1,500 bintang. Pasti sukar untuk kita mengenal pasti bintang yang mana satu. Malah sekali imbas, titik cahaya yang berkedipan di langit malam kelihatan sama sahaja. Oleh itu, beribu tahun dahulu, ahli astronomi awal telah membahagikan bintang mengikut kumpulan dan melukis gambar khayalan seperti kala jengking atau beruang, di sekeliling kumpulan bintang tersebut supaya mudah diingat. Bintang di dalam sesuatu buruj itu se
Post a Comment
Read more...

Can you IMAGINE IF Selena Gomez and Taylor Swift WEAR HIJAB?

Post a Comment
Read more...

Why Do Languages Die?

Urbanization, the state and the rise of nationalism. “The history of the world’s languages is largely a story of loss and decline. At around 8000 BC, linguists estimate that upwards of 20,000 languages may have been in existence. Today the number stands at 6,909 and is declining rapidly. By 2100, it is quite realistic to expect that half of these languages will be gone, their last speakers dead, their words perhaps recorded in a dusty archive somewhere, but more likely undocumented entirely. (…) The problem with globalization in the latter sense is that it is the result, not a cause, of language decline. (…) It is only when the state adopts a trade language as official and, in a fit of linguistic nationalism, foists it upon its citizens, that trade languages become “killer languages.” (…)
Post a Comment
Read more...