Biology: Cell Structure I Nucleus Medical Media


Cells are the smallest living units of
an organism. All cells have three things in
common no matter what type of cell they are. All cells have a cell membrane which separates the
inside the cell from its environment, cytoplasm, which is a jelly-like fluid, and DNA which is the cell’s genetic
material. There are two broad categories of cells. The first category is eukaryotic cells. They have organelles which include the nucleus and other
special parts. Eukaryotic cells are more advanced,
complex cells such as those found in plants and
animals. The second category is prokaryotic
cells. They don’t have a nucleus or membrane
enclosed organelles. They do have genetic material but it’s
not contained within a nucleus. Prokaryotic cells are always one celled, or unicellular organisms, such as
bacteria. So what are organelles? Organelle means “little organ.” Organelles are the specialized parts of a cell that have unique jobs to perform. Let’s start with the nucleus, the
control center of the cell. The nucleus contains DNA or genetic
material. DNA dictates what the cell is going
to do and how it’s going to do it. Chromatin the tangled, spread out form of DNA
found inside the nuclear membrane. When a cell is ready to divide DNA condenses into structures known as
chromosomes. The nucleus also contains a nucleolus, which is a structure where ribosomes
are made. After ribosomes leave the nucleus they will have the important job of “synthesizing”, or making, proteins. Outside the nucleus the ribosomes and
the rest of the organelles float around in cytoplasm, which is the
jelly-like substance. Ribosomes may wander freely within
the cytoplasm or attach to the endoplasmic
reticulum, sometimes abbreviated as ER. There are two types of ER: rough ER has ribosomes attached to it and smooth ER doesn’t have
ribosomes attached to it. The endoplasmic reticulum is a membrane enclosed passageway for
transporting materials such as the proteins synthesized by
ribosomes. Proteins and other materials emerge from the endoplasmic reticulum in small vesicles where the Golgi apparatus, sometimes called the Golgi body receives them. As proteins move through the Golgi body
they’re customized into forms that the cell can use. The Golgi body does this by folding the
proteins into usable shapes. or adding other materials on to them such as lipids or carbohydrates Vacuoles are sac-like structures that store
different materials. Here, in this plant cell, the central vacuole stores water. Going back to the animal cell, you’ll see an organelle called a lysosome. Lysosomes are the garbage collectors that take in damaged or worn out cell parts. They are filled with enzymes that break
down this cellular debris. The mitochondrion in is an organelle
that is the powerhouse for both animal and plant cells. During a process called cellular respiration the mitochondria make ATP molecules that provide the energy for all the
cells activities. Cells that need more energy have more mitochondria. Meanwhile the cell maintains its shape through a cytoskeleton. The cytoskeleton includes the thread-like microfilaments which are made of protein and microtubules which are thin hollow tubes Some organisms such as plans that are photoautotrophic meaning they capture sunlight for energy have cells with an organelle called
a chloroplast. The chloroplast is where
photosynthesis happens It’s green because it has a green
pigment called chlorophyll. Plant cells also have a cell wall
outside of their cell membranes that shape, support, and protect the plant cell. Animal cells never have a cell wall There are many other unique
structures that only some cells have. Here are just a few. In humans, for example, the respiratory tract is lined with cells that have cilia. These are microscopic
hair-like projections that can move in waves. This feature helps trap inhaled particles in the air and expels them when you cough. Another unique feature in some cells is flagella. Some bacteria have flagella. A flagellum is like a little tail that
can help a cell move or propel itself. The only human cell that has a flagellum is a sperm cell. In summary remember: eukaryotic cells are plant and animal cells with a nucleus and membrane-enclosed organelles While prokaryotic cells are unicellular organisms without these things. All cells have a cell membrane, cytoplasm and genetic material. And even though only plant cells have
chloroplasts both plant and animal cells have mitochondria.

100 thoughts on “Biology: Cell Structure I Nucleus Medical Media

  1. It is really a very very good video as well as animation I really understood lot from this 7 min video that I never understood in my Class

  2. Just read 30 long pages about organelles in my AP Bio book and did not learn a thing. Watched this video and I can name the different organelles.

  3. Hi. This video can help me to learn more. Thank you for this video. Do you have any document form of this video?

  4. It is nice I'm learning to speak English at actually I'm student of biology I'm from Mexico and how I understand those topics I can also understand a lit English ,thanks so much for the video that is very good 👍

  5. Thanks a lot of for the animation,😊 was so confused what the teacher says sounds complicated without your animation

  6. FIRST MATTER: In every facet of the motion of all particles the light of Divine unity shines like the sun. For as is proved briefly in the First Indication of the Tenth Word and in detail in the Twenty-Second Word, if every particle is not an official of God acting with His permission and under His authority, and if it is not undergoing change within His knowledge and power, then every particle must have infinite knowledge and limitless power; it must have eyes that see everything, a face that looks to all things, and authority over all things. For every particle of the elements acts, or can act, in an orderly fashion in all animate beings. But the order within things and laws according to which they are formed differ from one thing to the next. If their order was not known to the particles, the particles could not act, or even if they could act, they could not act without error. In which case, the particles which are performing their duties in beings are either acting with the permission and at the command, and within the knowledge and at the will, of the owner of an all-encompassing knowledge, or they themselves must have such an all-encompassing knowledge and power. Yes, all particles of air can enter the bodies of all animate beings, the fruits of all flowers, and the structures of all leaves. They can act within them, although the way the beings are formed is all different and their order and systems quite distinct. As though the factory of a fig was a loom for weaving cloth and the factory of a pomegranate, a machine for producing sugar, and so on; the programmes of their structures and bodies all differ from each other. A particle of air, then, enters or can enter all of them. It takes up its position and acts in a wise and masterly fashion without error. And on completion of its duty it departs. A mobile particle of mobile air, therefore, either must know the forms, shapes, measures, and formations with which plants and animals, and even fruits and flowers, are clothed, or else it must be an official acting under the command and will of one who does know. Similarly with a stationary particle of stationary earth: since it has the ability to be the means and place of cultivation for all the seeds of all flowering plants and fruit-bearing trees, either there must be in the particle itself or in the handful of soil that is its little house immaterial machinery and factories in good working order to the number of the varieties of the trees and plants, and flowers and fruits in fact, it is in every single particle that there must be a factory peculiar to it and all the equipment and machinery necessary for the running of the factory or else it must have a miraculous knowledge that knows all things about all things and a miracle-working power that creates everything from nothing; or, those duties are performed at the command and with the permission of One Who is Knowing of All Things, and through the power and might of One Who is Absolutely Powerful over All Things. If an untrained and inexperienced, common, ordinary, and blind man was to go to Europe and in all the factories there to work at all the trades and crafts in perfect and masterly fashion, and if he was to display a wise and artistic skill to such a degree that it left everyone speechless with amazement, anyone with a grain of consciousness would know that the man was not acting on his own initiative, but that a master of all trades was teaching him and causing him to work. And if there was a blind and impotent man who lived in a simple little house and was unable even to rise from his place, and if small fragments of stone, and bits and pieces of material like bone and cotton were to enter his little house and then sacks of sugar, bales of cloth, crates of jewelry, finely-made clothes encrusted with jewels, and delicious foods were to emerge, would anyone with a grain of intelligence not say: "That man is a wretched doorkeeper or merely a latch on the door of the factory of a wondrous miracle-working being, which is the source of his miracles"? In exactly the same way, the motion and duties of particles of air in plants and trees, and blossom and fruit, all of which are missives of the Eternally Besought One, antique dominical works of art, miracles of power, and wonders of wisdom, indicate that the particles are acting under the command and at the will of an All-Wise and Glorious Maker, an All-Generous and Beauteous Creator. Particles of earth, also, since they are the source and means for the shoots and plants produced by seeds, each of which is a different factory and workbench, a different printing-press, treasury, and antique, a different manifesto proclaiming the Glorious Maker's Names and ode hymning His perfections, it is as definite as two plus two equalling four that the particles of earth are acting at the command, with the permission, and through the will and power of an All-Glorious Maker Who is Lord of the command of "Be!" and it is, {[*]: Qur'an, 36:82, etc.} and to Whose command everything is subjugated. In this we believe. Risale-i Nur Collection 572 – Bediüzzaman Said Nursi

  7. in case if you need

    Cell stracture(lecture)

    Cells are the smallest living units of an organism. All cells have three things in common no matter what type of cell they are. All cells have a cell membrane which separates the inside the cell from its environment, cytoplasm, which is a jelly-like fluid, and DNA which is the cell's genetic material. There are two broad categories of cells. The first category is eukaryotic cells. They have organelles which include the nucleus and other special parts. Eukaryotic cells are more advanced, complex cells such as those found in plants and animals. The second category is prokaryotic cells. They don't have a nucleus or membrane enclosed organelles. They do have genetic material but it's not contained within a nucleus. Prokaryotic cells are always one celled, or unicellular organisms, such as bacteria. So what are organelles? Organelle means "little organ." Organelles are the specialized parts of a cell that have unique jobs to perform. Let's start with the nucleus, the control center of the cell. The nucleus contains DNA or genetic material. DNA dictates what the cell is going to do and how it's going to do it. Chromatin the tangled, spread out form of DNA found inside the nuclear membrane. When a cell is ready to divide DNA condenses into structures known as chromosomes. The nucleus also contains a nucleolus, which is a structure where ribosomes are made. After ribosomes leave the nucleus they will have the important job of "synthesizing", or making, proteins.Outside the nucleus the ribosomes and the rest of the organelles float around in cytoplasm, which is the jelly-like substance. Ribosomes may wander freely within the cytoplasm or attach to the endoplasmic reticulum, sometimes abbreviated as ER. There are two types of ER: rough ER has ribosomes attached to it and smooth ER doesn't have ribosomes attached to it. The endoplasmic reticulum is a membrane enclosed passageway for transporting materials such as the proteins synthesized by ribosomes. Proteins and other materials emerge from the endoplasmic reticulum in small vesicles where the Golgi apparatus, sometimes called the Golgi body receives them. As proteins move through the Golgi body they're customized into forms that the cell can use. The Golgi body does this by folding the proteins into usable shapes. or adding other materials on to them such as lipids or carbohydrates Vacuoles are sac-like structures that store different materials. Here, in this plant cell, the central vacuole stores water. Going back to the animal cell, you'll see an organelle called a lysosome. Lysosomes are the garbage collectors that take in damaged or worn out cell parts. They are filled with enzymes that break down this cellular debris. The mitochondrion in is an organelle that is the powerhouse for both animal and plant cells. During a process called cellular respiration the mitochondria make ATP molecules that provide the energy for all the cells activities. Cells that need more energy have more mitochondria. Meanwhile the cell maintains its shape through a cytoskeleton. The cytoskeleton includes the thread-like microfilaments which are made of protein and microtubules which are thin hollow tubes Some organisms such as plans that are photoautotrophic meaning they capture sunlight for energy have cells with an organelle called a chloroplast. The chloroplast is where photosynthesis happens It's green because it has a green pigment called chlorophyll. Plant cells also have a cell wall outside of their cell membranes that shape, support, and protect the plant cell. Animal cells never have a cell wall. There are many other unique structures that only some cells have. Here are just a few. In humans, for example, the respiratory tract is lined with cells that have cilia. These are microscopic hair-like projections that can move in waves. This feature helps trap inhaled particles in the air and expels them when you cough. Another unique feature in some cells is flagella. Some bacteria have flagella. A flagellum is like a little tail that can help a cell move or propel itself. The only human cell that has a flagellum is a sperm cell. In summary remember: eukaryotic cells are plant and animal cells with a nucleus and membrane-enclosed organelles While prokaryotic cells are unicellular organisms without these things. All cells have a cell membrane, cytoplasm and genetic material. And even though only plant cells have chloroplasts both plant and animal cells have mitochondria.

  8. i really want to shout at the ones that organize curriculum in my country. YOU. CANT. TEACH. BIOLOGY. WITHOUT. VISUAL. PRESENTATION. thank you.

  9. Ur video is osm….if teacher taughts students in animation way student learn more…nd these type of videos help the student to understand the concept easily..

  10. things i learned:
    nucleolus makes ribosomes
    ribosomes make proteins
    the er transports materials such as proteins which can leave the er and go to the golgi body in vesicles
    the golgi body uses the proteins from the vesicles and tranforms them/folds them into useable proteins sometimes adding lipids/carbs
    lysosomes are filled with enzymes
    cytoskeleton is what makes the cell keep its shape

  11. Oh, and all this happened by chance? Yeah Right! I once took, a college level Anatomy, & Physiology class, and I thought it was mind- blowing, how complex a human cell is. Keep in mind, our bodies are made of trillions of cells. There is No way, everything just happened by chance. There most be, a Great Designer behind all creation!
    Genesis 1: 27 New King James Version (NKJV)
    27 "So God created man in His own image; in the image of God He created him; male and female He created them."

    Psalm 19: 1 (NKJV)
    A Psalm of David.
    19 "The heavens declare the glory of God;
    And the firmament shows His handiwork."

  12. This really helps me now in science i have 96 grades becuase I advance study thank you so much ❤

  13. It is amazing how reverse engineering of intergrated functional systems that appear to have been produced with foresight and foreknowledge causes one to think how we could better maintain such a system for future our benefit. Intellegently created indeed.

  14. Hey please clear my dobt .I had argued my teacher that nucleus is cell organelle but he said cell structure.🧐

  15. The fact that DNA sends instructions to other locations means that is comes from intelligence. You can't evolve this with DARWIN'S evolution. The DNA code is chemically isolated from the protein making mechanism: so it must come from a computer outside the universe that is simulating our existence.

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