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1
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2
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- Histology:
- Tissues:
- groups of cells which are
similar in structure and which perform common or related functions.
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3
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- Epithelial Tissue
- Connective Tissue
- Muscle Tissue
- Nervous Tissue
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4
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- Epithelial Tissue Locations:
- Covers the body
- Lines the cavities, tubes, ducts
and blood vessels inside the body
- Covers the organs inside body cavities
- Epithelial Tissue Functions:
- Protection from physical &
chemical injury,
- Protection against microbial
invasion,
- Contains receptors which respond
to stimuli,
- Filters, secretes &
reabsorbs materials and
- Secretes serous fluids to
lubricate structures.
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5
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- Connective Tissue:
- Most abundant & widely
distributed tissue
- Connective Tissue Functions:
- Connects, binds and supports
structures,
- Protects & cushions organs and tissues,
- Insulates (fat) and
- Transports substances (blood).
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6
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- Muscle Tissue:
- Associated with the bones of the
skeleton, the heart and in the walls of the hollow organs of the body.
- Muscle Tissue Functions:
- Movement
- Locomotion
- Maintains posture
- Produces heat
- Facial expressions
- Pumps blood
- Peristalsis
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7
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- Nervous Tissue:
- Main component of the nervous
system,
- ie., brain, spinal cord & nerves.
- Nervous Tissue Functions:
- Regulates & controls body
functions
- Generates & transmits nerve
impulses
- Supports, insulates and protects
impulse generating neurons.
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8
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- Cell Organelles
- cell membrane
- cytoplasm
- nucleus
- nuclear membrane
- nucleolus
- chromosomes
- chromatin
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9
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10
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11
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12
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13
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14
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- Stages of Mitosis, or the Cell Cycle:
- interphase
- prophase
- metaphase
- anaphase
- telophase
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15
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- Metabolic phase
- Cell growth
- DNA replication
- Centriole replication
- Protein Synthesis
- Visible Nucleus & nuclear membrane
- Visible nucleoli
- Chromatin
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16
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- Nuclear membrane disappears
- Nucleoli disappear
- Chromsomes appear
- Centrioles move to opposite sides of cell
- Spindle fibers from centrioles connect with chromosomes
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17
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- Chromosomes line up on equator of the cell
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18
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- Chromatids from each chromosome separate & are pulled to opposite
sides of the cell.
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19
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- Chromatids reach extremes of cell
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20
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21
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- Specific tissue types & representative cell types we will review:
- epithelial
- Squamous
- Cuboidal
- Columnar
- connective
- Adipose
- Bone
- Hyalaine cartilage
- muscle
- nervous
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22
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23
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- Simple one cell thick
- Roughly cube shaped
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24
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- Simple one cell thick
- Column shaped (long & narrow)
- Line digestive tract where reabsorption & secretion occurs.
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25
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- Specific Connective Tissue Types:
- Adipose
- Bone
- Hyalaine cartilage
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26
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- Honeycomb or chickenwire appearance
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27
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- Tree ring-like appearance
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28
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29
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- Specific Muscle Tissue Types:
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30
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- Muscle fibers (cells) long, parallel & cylindrical
- With many nuclei (multinucleate)
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31
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