anatomy & physiology cell + cell cells + cells tissue + tissues organ + organs system + systems...
TRANSCRIPT
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Anatomy & Physiology
Cell + Cell Cells + Cells Tissue + Tissues
Organ + Organs
System +
Systems
Human Body
Structural Units
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Cells membrane
Definition: - Is the membrane that encloses the cytoplasm of a cell.
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Cytoplasm
* Gel-like fluid, occupies a major portion of the cell.
* It consists mainly of water. Functions: 1- Absorption.
2- Cell duplication.
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Nucleus
- Nucleus has DNA & RNA.- DNA & RNA are 2 proteins that carry genetic
information.- The nucleus is the Control Center of the cell.
- It directs the metabolic activities.- At least one nucleus in each cell.
- RBC lose their nucleus as they mature.- Skeletal muscle have more than one nucleus.
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Anatomy & Physiology
Cell + Cell Cells + Cells Tissue + Tissues
Organ + Organs
System +
Systems
Human Body
Structural Units
![Page 11: Anatomy & Physiology Cell + Cell Cells + Cells Tissue + Tissues Organ + Organs System + Systems Human Body Structural Units](https://reader035.vdocuments.us/reader035/viewer/2022062407/56649c9c5503460f9495b959/html5/thumbnails/11.jpg)
Tissues * Tissues are group of specialized cells that joint together to perform a particular function
1- Epithelial
2- Connective
3- Muscle
4- Nerve
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Epithelial Tissues
* Epithelial tissue make a continuous covering of external (Skin) & internal (GIT)
body surfaces.
* Functions:
1- Protection
2- Secretion
3- Regulate the passage of materials across them.
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Epithelial Tissues* In the small intestine it absorbs nutrients.
* In glands it secrets digestive enzymes, hormones, mucous & saliva.
* Specialized epithelial cells, i.e. have special Functions such as skin color, hair,
nails, mucous production & sweat regulation.
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Connective Tissue* It is the major structural material of
the body. Functions:
- Provide support for the body
- Connects its organs & tissues.
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Connective Tissues
* It includes( tendons, cartilage, bone, blood, lymph)
* Their functions include:- Bind & support other tissues.
- Store fat.- Kill bacteria.
- Produce blood cells & produce antibodies against infection &
diseases
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Membranes
* They are layers of tissues.* Functions:
- Cover.- Line.
- Divide.
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Membranes
1- Meninges
2- Cell Membrane
3- Serous Membrane
4-Mucous Membrane
5-Synovial Membrane
Types
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Membranes
* Meninges:- It covers the brain & the spinal cord
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Membranes
* Cell Membrane:- Structural.
- Transportation.
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Membranes
* Serous Membrane:- Surrounds organs in the chest & stomach
- Provide protection against disease & reduce friction with neighboring parts.
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Membranes
* Mucous Membrane:- Lines digestive & respiratory tracts.
- Secrets mucous fluid that fights infection, contains antibodies.
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Membranes
* Synovial Membrane:- Covers joints & tendons like a bag or sac.- It contains fluid that lubricate joints called
synovial fluid.
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