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AS level biology
Unit 1 Mrs Carne
Tissues
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What is a
tissue
?
A tissue is an
aggregation
of cells that work together to perform a
specific
function.
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How do tissues relate to organs?
Tissues
form the
building blocks
of organs.
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What are the main types of tissues?
Epithelial tissue
Connective tissue
Muscle tissue
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What is the structure of epithelial tissue?
Epithelial tissue
is made of tightly packed cells forming a continuous layer on a
basement membrane
.
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What is the primary function of epithelial tissue?
Epithelial tissue
covers and lines body surfaces and protects
underlying
structures.
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What are the different types of
epithelial tissue
?
Squamous epithelium
Cuboidal epithelium
Columnar epithelium
Ciliated epithelium
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What characterizes squamous
epithelium
?
Squamous epithelium
consists of thin, flattened
cells
that are one cell thick.
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Where is squamous epithelium typically found?
Squamous epithelium
is found in areas requiring diffusion, such as the
alveoli
in the lungs.
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What is the structure of
cuboidal epithelium
?
Cuboidal epithelium consists of
cube-shaped
cells.
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What is the function of
cuboidal epithelium
?
Cuboidal epithelium is often involved in
absorption
and
secretion
.
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Where is
cuboidal epithelium
commonly found?
Cuboidal epithelium is often found in
kidney tubules
.
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What characterizes
columnar epithelium
?
Columnar epithelium consists of tall,
rectangular
cells.
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Where is
columnar epithelium
typically found?
Columnar epithelium is found in areas such as the
intestines
.
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What is unique about
ciliated epithelium
?
Ciliated epithelium has cilia on its surface.
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Where is
ciliated epithelium
found and what is its function?
Ciliated epithelium is found in the
trachea
and
fallopian tubes
, moving mucus and eggs, respectively.
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What is the structure of
connective tissue
?
Connective tissue is characterized by a few cells spread through an
extracellular matrix
.
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What is the primary function of
connective tissue
?
Connective tissue supports,
binds
, and protects other tissues and organs.
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What are the different types of
connective tissue
?
Cartilage
Bone
Blood
Adipose tissue
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What is the function of
cartilage
?
Cartilage provides support and flexibility.
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What is the structure of bone?
Bone
is a rigid structure that supports the body.
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What is the function of blood as a
connective tissue
?
Blood
is a liquid connective tissue that transports nutrients, gases, and wastes.
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What is the function of
adipose tissue
?
Adipose tissue stores fat and provides
insulation
and energy reserves.
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What is the structure of muscle tissues?
Muscle tissues
consist of elongated cells known as
muscle fibers
.
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What is the primary function of muscle tissues?
Muscle tissues
are responsible for producing movement by contracting in response to
stimulants
.
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What are the three main types of muscle tissues?
Skeletal muscle
Cardiac muscle
Smooth muscle
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What characterizes
skeletal muscle
?
Skeletal muscle has voluntary control and a
striated
appearance.
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Where is
skeletal muscle
found?
Skeletal muscle is attached to
bones
.
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What characterizes
cardiac muscle
?
Cardiac muscle is found only in the heart and has
involuntary
control.
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What is unique about
cardiac muscle
structure?
Cardiac muscle has
intercalated discs
that allow for synchronized contraction.
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What characterizes
smooth muscle
?
Smooth muscle is
involuntary
and
non-striated
in appearance.
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Where is
smooth muscle
typically found?
Smooth muscle is found in the walls of hollow organs such as
intestines
and
blood vessels
.
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