Biology Quick Information Illustration
Transcript of Biology Quick Information Illustration
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Red blood cells are also
known as RBCs, red
blood corpuscles,
haematids, erythroid
cells or erythrocytes.
Mature red blood cells are
flexible biconcave disks that
lack a cell nucleus and most
organelles. This cell acts as
medium to transport oxygen
to all of the body cell.
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Human
immunodeficiency
virus (HIV) is amember of the retrovirus
family. It causes
acquiredimmunodeficiency
syndrome (AIDS) in
which humans immune
system begins to fail,
leading to life-threatening opportunistic
infections. Infection with
HIV occurs by the
transfer of blood,
semen, vaginal fluid,
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Plant cells are eukaryotic cells
that differ in several key respects
from the cells of other
eukaryotic organisms. They haveParenchyma cells,collenchyma
cells,Pectin and hemicellulose,
Sclerenchyma cells and most
distictively has chloroplast tomake their own food
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The cell is the functional basic unit
of life. It is the smallest unit of life
that is classified as a living thing,and is often called the building
block of life. Humans have about
100 trillion or 1014 cells; a typical
cell size is 10 m; a typical cell
mass is 1 nanogram. The largest
cells are about 135 m in theanterior horn in the spinal cord
while granule cells in the
cerebellum, the smallest, can be
some 4 m and the longest cell can
reach from the toe to the lower
brain stem
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Sperm is male reproductive cells. In the types of
sexual reproduction known as anisogamy and
oogamy, there is a marked difference in the size of
the gametes with the smaller one being termed the
"male" or sperm cell. The human sperm cell is
haploid, so that its 23 chromosomes can join the 23
chromosomes of the female egg to form a diploidcell. Sperm cells cannot divide and have a limited
life span, but after fusion with egg cells during
fertilization, a new organism begins developing,
starting as a totipotent zygote.
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An ovum (plural ova, from the
Latin word ovum meaning eggor egg cell) is a haploid female
reproductive cell or gamete. Both
animals and embryophytes have
ova. The term ovule is used for
the young ovum of an animal, as
well as the plant structure that
carries the female gametophyte
and egg cell and develops into a
seed after fertilization. In lowerplants and algae, the ovum is
also often called oosphere.
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The bacteria are a large
group of unicellular,prokaryote microorganisms.
Typically a few micrometres in
length, bacteria have a wide
range of shapes, ranging from
spheres to rods and spirals.
Bacteria are ubiquitous inevery habitat on Earth,
growing in soil, acidic hot
springs, radioactive waste,
water, and deep in the Earth's
crust, as well as in organicmatter and the live bodies of
plants and animals.
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per second).
Paramecium is a group of unicellular
ciliate protozoa, which are
commonly studied as arepresentative of the ciliate group,
and range from about 50 to 350 m
in length. Simple cilia cover the
body, which allow the cell
to move with a synchronousmotion (like a caterpillar) at
speeds of approximately
2,700m/
second (12 body lengths
per second).
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Amoeba is a genus of protozoan.The
cell's organelles and cytoplasm are
enclosed by a cell membrane, obtaining
its food through phagocytosis.
Amoebae have a single large tubular
pseudopod at the anterior end, and
several secondary ones branching to
the sides. The most famous species,
Amoeba proteus, averages about 220-
740 m in length while moving, making
it a giant among amoeboids.[7] A few
amoeboids belonging to different
genera can grow larger, however, such
as Gromia, Pelomyxa, and Chaos.
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A virus is a small infectious agent that can replicate only inside the
living cells of organisms. Most viruses are too small to be seen
directly with a light microscope. Viruses infect all types of
organisms, from animals and plants to bacteria and archaea. Sincethe initial discovery of tobacco mosaic virus by Martinus
Beijerinck in 1898, about 5,000 viruses have been described in
detail, although there are millions of different types. Viruses are
found in almost every ecosystem on Earth and are the most
abundant type of biological entity.