Introduction : Fundamental Unit of Life - Science, Class 9 Video Lecture

the room you are watching on your screen
is a science lab here the teacher is
calling each student one by one and
asking them to look through the lens of
microscope
can you guess what type of structures
will they be observing let's go back in
time to get an answer in the year 1665 a
scientist named Robert Hooke designed a
microscope it was not like simple school
microscopes that we use today that
microscope relied on sunlight to
illuminate the image while examining a
thin slice of cork under this microscope
he saw that the structure resembled a
honeycomb with great many little boxes
he named these structures as cells a
Latin word for a little room have you
ever wondered what is a cell made up of
a cell is made up of special components
called organelles the basic organelles
present in almost every cell are plasma
membrane nucleus and cytoplasm so now I
am sure you can answer the question that
I asked yes the students will be
observing the cells of the material
provided to them say for example an
onion peel a cork or a section of stem
let's try to know more about the cells
that are the basic component of life
through this chapter here we will be
studying about cell cell organelles like
cell wall plasma membrane and cytoplasm
nucleus structure and function vacuoles
endoplasmic reticulum and
Golgi apparatus mitochondria lysosomes
and plastids