Animal Cells (& Tissues)

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Animal Cells ( Tissues)

• Eileen Grzybowski

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Cheek Cells
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Cheek Cells
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Cheek Cells
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Cheek Cells are examples of Epithelial Tissues
In which one(s) do cheek cells belong?
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Nerve Cells Neurons
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Neurons
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Bone Cells
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Blood- Red Blood Cells
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RBCs Erthrocytes (red) (cell)
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White Blood Cells WBCs
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WBCs Leukocytes (white)(cells)

(v. Platelets v. RBCs)
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Baby BCs to Adult BCs
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In Summary
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Muscle Cells
Skeletal Muscle
Cardiac Muscle
Smooth Muscle
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Skeletal Muscle
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Tissues

• Biological tissue is a collection of
  interconnected cells that perform a similar
  function within an organism.
• The study of tissue is known as histology, or, in
  connection with disease, histopathology.
• The classical tools for studying the tissues are
  the , the , and the optical microscope, though
  developments in electron microscopy,
  immunofluorescence, and frozen sections have all
  added to the sum of knowledge in the last couple
  of decades.With these tools, the classical
  appearances of the tissues can be examined in
  health and disease, enabling considerable
  refinement of clinical diagnosis and prognosis.
  There are four basic types of tissue in the body
  of all animals, including the human body and
  lower multicellular organisms such as insects.
  These compose all the organs, structures and
  other contents.

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Animal Tissues are groups of similar cells which
work together.
Epithelium - Tissues composed of layers of cells
that cover organ surfaces such as surface of the
skin and inner lining of digestive tract the
tissues that serve for protection, secretion, and
absorption. Connective tissue - As the name
suggests, connective tissue holds everything
together. Connective tissue is characterized by
the separation of the cells by an inorganic
material, which is called extracellular matrix.
Bone and blood are connective tissues. Muscle
tissue - Muscle cells contain contractile
filaments that move past each other and change
the size of the cell. Muscle tissue also is
separated into three distinct categories
visceral or smooth muscle, which is found in the
inner linings of organs skeletal muscle, which
is found attached to bone in order for mobility
to take place and cardiac muscle which is found
in the heart. Nervous tissue - Cells forming
the brain, spinal cord and peripheral nervous
system.
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• Cells the simplest structure
• Tissues epithelial, connective,
  muscle, nervous
• Organs stomach, heart, lungs, brain,
  intestines, etc.
• Organ Systems digestive, respiratory, nervous,
  skeletal-muscular, etc.
• Organism contains all of the above