Cell Organelles Video Lecture | Science Class 9

0:0:0: hello everyone today we are going to
0:0:2: learn about cell
0:0:4: organal we have already seen that cell
0:0:7: is the smallest unit of life large and
0:0:10: complex cells need a lot of chemical
0:0:12: activities to support life to keep these
0:0:15: processes separate from each other the
0:0:18: cells use membrane bound small
0:0:20: structures these are cell
0:0:23: organal organal are specialized
0:0:25: structures that perform various jobs
0:0:28: inside cells the term literally means
0:0:31: little
0:0:32: organs in the same way organs such as
0:0:35: the heart liver stomach and kidneys
0:0:38: serve specific functions to keep an
0:0:40: organism alive organal serve specific
0:0:43: functions to keep a cell alive these
0:0:46: organal are so small that we need an
0:0:48: electron microscope to see
0:0:51: them you might have heard of these
0:0:54: organal let us see them one by one
0:0:58: endoplasmic reticulum
0:1:0: the ER is a large network of membrane
0:1:3: bound tubes and
0:1:4: sheets it looks like long tubules or
0:1:7: round or oblong Banks the one function
0:1:11: of ER is to serve as channels for the
0:1:13: transport of materials between various
0:1:15: regions of the cytoplasm or between the
0:1:18: cytoplasm and the
0:1:19: nucleus the ER also functions as a
0:1:23: cytoplasmic framework providing a
0:1:25: surface for some of the biochemical
0:1:27: activities of the cell there are two
0:1:29: types of er rough endoplasmic reticulum
0:1:33: re and smooth endoplasmic reticulum
0:1:37: s ARA looks rough under microscope
0:1:41: because it has particles called
0:1:42: ribosomes attached to its
0:1:45: surface the ribosomes are the sites of
0:1:47: protein manufacture the manufactured
0:1:50: proteins are then sent to various places
0:1:52: in the cell depending on the need using
0:1:55: the
0:1:56: ER the SE helps in the manufacturer of
0:1:59: fat molecules or lipids important for
0:2:2: cell function some of these proteins and
0:2:5: lipids help in building the cell
0:2:8: membrane some other proteins and lipids
0:2:10: function as enzymes and
0:2:16: hormones GGI
0:2:18: apparatus the GGI apparatus first
0:2:21: described by Camelo GOI consists of a
0:2:24: system of membrane bound vesicles
0:2:26: arranged approximately parallel to each
0:2:28: other in stacks SC
0:2:30: Systems the material synthesized near
0:2:33: the ER is packaged and dispatched to
0:2:35: various targets inside and outside the
0:2:38: cell through the goldi
0:2:39: apparatus its functions include the
0:2:42: storage modification and packages of
0:2:44: products in
0:2:46: versicles in some cases complex sugar
0:2:48: may be made from simple sugar in the
0:2:50: goldi
0:2:52: apparatus it is also involved in the
0:2:54: formation of
0:2:58: lomes lomes
0:3:0: lomes are a kind of waste dispatch and
0:3:3: Disposal system of the cell lomes help
0:3:7: to keep the cell clean by digesting any
0:3:9: foreign material as well as worn out
0:3:12: cell
0:3:13: organ foreign materials entering the
0:3:15: cells such as bacteria or food as well
0:3:18: as old organal end up in the lome which
0:3:21: break them up into small
0:3:23: pieces they are able to do this because
0:3:26: they contain powerful digestive enzymes
0:3:28: capable of break taking down all organic
0:3:31: material under abnormal condition when
0:3:34: the cell gets damaged lomes May burst
0:3:37: and the enzymes digest their own cell
0:3:40: therefore they are also known as suicide
0:3:46: Banks
0:3:48: mitochondria mitochondria are known as
0:3:51: powerhouses of the cell the energy
0:3:54: required for various chemical activities
0:3:56: needed for life is released by
0:3:58: mitochondria in the form form of ATP
0:4:0: adenosine triphosphate
0:4:3: molecules ATP is known as the energy
0:4:6: currency of the cell mitochondria have
0:4:9: two membrane coverings instead of just
0:4:11: one the outer membrane is very porous
0:4:15: while the inner membrane is deeply
0:4:17: folded they are able to make some of
0:4:20: their own
0:4:24: protein
0:4:26: plastids plastids are present only in
0:4:29: plant cell cells there are two types of
0:4:32: plastids chromoplasts and lcop plasts
0:4:35: chromoplasts are the colored plastids
0:4:37: present in leaves flowers and
0:4:40: fruits plastids containing the pigment
0:4:42: chlorophyll are known as
0:4:45: chloroplasts they are important for
0:4:47: photosynthesis in Plants chloroplasts
0:4:50: also contain various yellow or orange
0:4:53: pigments in addition to
0:4:55: chlorophyll leucoplasts are found
0:4:57: primarily in organal in which materials
0:5:0: such as starch oils and protein granules
0:5:2: are stored the internal organization of
0:5:5: the plastids consists of numerous
0:5:7: membrane layers embedded in a material
0:5:10: called stroma plastids are similar to
0:5:13: mitochondria in external structure
0:5:16: plastids have their own DNA and
0:5:21: ribosomes
0:5:22: vaces vacu are storage sacks for solid
0:5:26: or liquid
0:5:27: contents vacul are small sized in animal
0:5:30: cells while plant cells have very large
0:5:33: vaces about 50% to 90% cell volume in
0:5:38: amiba the food vacu contain the food
0:5:40: items that is consumed by it and
0:5:43: contractually vaces expels excess water
0:5:46: and some wastes from the cell in plant
0:5:49: cells vacul are full of cell sap and
0:5:51: provide turgidity and rigidity to the
0:5:56: cell let us see a labeled diagram of
0:5:58: animal cell
0:6:4: cell similarly a plant cell looks like
0:6:12: this so these are the complete
0:6:14: components of the cell all the organal
0:6:17: perform their functions for the survival
0:6:19: of the cell the cell thus has a basic
0:6:22: structural
0:6:24: organization this helps the cells to
0:6:26: perform functions like respiration
0:6:28: obtaining nutrition and clearing of
0:6:31: waste material or forming new
0:6:34: proteins
0:6:36: conclusion the cell is the fundamental
0:6:38: structural unit of living
0:6:40: organisms it is also the basic
0:6:42: functional unit of life all the
0:6:45: functions of cell are supported by its
0:6:47: several organal which in turn ensures
0:6:51: survival we hope that you have
0:6:53: understood the concept of cell
0:6:55: organ now here's a secret on how you can
0:6:58: study effectively with the urv app you
0:7:2: can learn with chapter notes watch video
0:7:4: lectures and solve ncer based McQ tests
0:7:8: of this chapter on
0:7:10: urv and that's not all you also get
0:7:13: amazing courses for class 9 and much
0:7:15: more for your class 9
0:7:17: preparation thank you