Chapter 1.3
description
Transcript of Chapter 1.3
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Chapter 1.3 Specialized Cells
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RegenerationThe process
whereby a body part is replaced or re-grown
Ex. Salamander- can re-grow
limbs lenses in the
eye parts of the
heart
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Human LiverHuman liver is the
only limb that has the natural ability to regenerate
In young children- finger tips that are cleaned and dressed properly can regenerate
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Cell Specialization Simple example- meerkats
Small mammals in AfricaClans to mobs of 20
Work together to find Food- Care for young- defend themselves
SUCCESS OF THIS CLAN IS DEPENDENT ON EVERYONE WORKING TOEGTHER
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Stem CellsEvery cell in your
body came from a small group of stem cells
Stem cell- unspecialized cell
They form specialized cells when exposed to the proper conditions
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Embryonic and Adult Cells
The two types of stem cells are Embryonic Adult
Differentiation: cells look different from one another and perform types
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Stem CellsAs cells mature into adult cells they become
specialized
Most adult cells stem cells are involved with the replacement of damaged tissue
Stem cells are found in BloodSkinNeural Tissue
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Meristematic Stems Plant stem cells
Found in the growing tips of roots
Also in the cambium- layer in the stem
Active thoughout the plants life
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Levels of OrganizationCell – Tissue – Organ- Organ System -
Organism
Tissue- group of cells working together to perform specific tasks
Multicellular organisms- made up of specialized cells
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Animal TissuesEpithelial
Connective
Muscle
Nervous
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Epithelial TissueCells are tightly
packed t form a protective barrier
Can be one cell thick
Ex. Skin tissue
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Connective TissueMain function- to
join tissues together
TendonsLigaments BoneCartilage Blood Stores fat
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BloodBlood- is a type of connective tissue
Blood is made up of PlasmaRed Blood CellsWhite Blood Cells
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Muscle TissueAllows for movement
3 main types Skeletal- voluntary Cardiac- only in the
heart Smooth- blood vessels
in the stomach
Smooth and cardiac- involuntary
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Nervous TissueResponds to stimuliTransmits and stores
informationSend messages-
impulses Nerve tissues
receive information both inside and outside