Transcript Tissues & The Systems they Compose

Tissues & The Systems they
Compose
What are Tissues?
• Tissues are an interactive group
of cells and intercellular
substances that take part in one
or more particular tasks.
What are Organs?
• Organs are structures
consisting of different tissues
that are organized in specific
proportions and patterns for a
particular function.
What are Organs Systems?
• Organ systems are composed
of two or more organs that are
interacting physically and/or
chemically to perform a
common task.
Tissue Types
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Epithelial
Connective
Muscle
Nervous
Epithelial Tissue
• A tissue of 1 or more layers of adhering cells
that covers the body’s external surfaces and
lines the internal cavities and tubes, and may
be important in absorption or secretion.
• It has a free surface where it meets its
surrounding and a basement layer where it
meets underlying connective tissue.
Classification of Epithelial Tissue
1. Number of Layers
– Simple Epithelium
– Stratified Epithelium
2. Shape
– Cuboidal
– Columnar
– Squamous
Connective Tissue
• A tissue composed of varying amounts
of fibroblasts, other cells, fiber
secretions (mostly collagen and elastin),
and modified polysaccharide ground
substances.
• It functions to bind and support other
tissues.
Types of Connective Tissue
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Proper Connective Tissues
1. Loose
2. Fibrous Dense
Specialized Connective Tissues
1. Cartilage
2. Bone
3. Adipose
4. Blood
Muscle Tissue
• A tissue composed of generally long
cells that have the ability to contract
under stimulation, passively lengthen,
and return to a resting position.
Muscle Types
1. Skeletal – cells are multinucleated,
striated and under conscious control.
2. Smooth – cells contain a single
nucleus, are not striated or under
conscious control.
3. Cardiac – cells are multinucleated,
striated and not under conscious
control.
Nervous Tissue
• A tissue composed of cells called
neurons that have the ability to change
state when stimulated and transfer that
state to adjacent cells. Nervous tissue
contains glial cells that support the
functioning of neurons as well.
Types of Nervous Tissue
• Neurons
• Neuroglea
Organ Systems
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Integument
Muscular
Skeletal
Nervous
Endocrine
Immune
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Circulatory
Lymphatic
Respiratory
Digestive
Urinary
Reproductive