Body Tissues



THE SKELETAL SYSTEM

THE SKELETON

APPENDICULAR VS. AXIAL SKELETON:
The axial skeleton consists of the skull, vertebrae column, and rib cage.
The appendicular skeleton consists of the bones of the extremities (arms, legs, shoulders, and pelvis) of the body.


Axial skeleton
Axial skeleton
Appendicular skeleton
Appendicular skeleton

PARTS OF THE SKELETAL SYSTEM:
1) Bone- rigid connective tissue
2) Cartilage- tough, elastic connective tissue
3) Joint- location where two bones meet
4) Tendon- band of inelastic connective tissue that connects bone to muscle
5) Ligament- band of inelastic connective tissue that connects two like materials together (bone to bone, muscle to muscle)



FUNCTIONS OF THE SKELETAL SYSTEM:

1) Provides shape to the body
2) Protects certain organs
3) Allows for body movement
4) Produces blood cells
5) Stores various chemical substances, such as calcium



PARTS OF THE BONE:

Red Bone Marrow- produces new blood cells
Yellow Bone Marrow- yellow fat inside the marrow cavity
Cancellous Tissue- spongy bone inside the epiphysis
Nutrient Foramen- hole where blood vessels enter bone to deliver blood to the marrow
Periosteum- tissue containing osteoblasts
Osteoblasts- remove calcium from the blood and deliver it to bone


Bone
Bone


BODY TISSUES
Tissues are groups of cells with similiar structures or functions.
TYPES OF TISSUES:
1) Epithelial Tissues (the skin and linings of the organs) - covers and lines the body to protect, absorb, filter, and secrete
Epithelial tissue
Epithelial tissue



2) Connective Tissues (bone, cartilage, and fats) - connects body parts to protect, cover, and bind
connective tissue
connective tissue




3) Muscle Tissues- contract and shorten to produce body movement


Muscle Tissue
Muscle Tissue


4) Nervous Tissues- made of neurons that receive and conduct electrical impulses from one part of the body to another allowing messages to be conveyed between the brain and other body parts
Nervous Tissue
Nervous Tissue





CLASSIFICATIONS OF EPITHELIAL TISSUES:

Layers:
1) Simple- one layer of cells
2) Stratified- multiple layers of cells
3) Pseudo-stratified- one layer that appears to have multiple layers


Shape:
1) Squamous Cells- flat like fish scales
Squamous Cell
Squamous Cell



2) Cuboidal Cells- cube-shaped like dice
Cuboidal Cell
Cuboidal Cell



3) Columnar Cells- tall rectangles like columns

Columnar Cells
Columnar Cells




TYPES OF CONNECTIVE TISSUES:

1) Bone- protects and supports body organs
2) Cartilage- softer and more flexible than bone that covers the ends of bones
3) Dense Connective Tissue- includes "rope-like" structures such as tendons and ligaments
4) Loose Connective Tissue- includes soft tissues such as fat that protect and hold together body organs
5) Blood- blood cells surrounded by plasma



SKELETAL TISSUE
CARDIAC TISSUE
SMOOTH TISSUE
APPEARANCE
striated
striated
non-striated
FUNCTION
controls voluntary movement, such as contracting arm muscles or creating facial expressions
controls involuntary movement, allows the heart to pump and move blood through the body
controls involuntary movement, which allows the organs to pass substances to the next organ
LOCATION
attached to the skeleton
found only in the heart
found in hollow organs (stomach, bladder, uterus, blood vessels)
Skeletal Tissue
Skeletal Tissue



Cardiac Tissue
Cardiac Tissue

Smooth Tissue
Smooth Tissue




How the Body Works : Skeletal Muscles
More science games & videos on Skeletal System at NeoK12.com  


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Bibliography:
Axial Skeleton picture:
file:axial skeleton diagram.svg
Appendicular Skeleton picture: http://en.wikipedia.org/wiki/File:Appendicular_skeleton_diagram.svg
Bone Picture: http://www.bonefromblood.org/background/BoneStructure%20best.jpg
Epithelial Tissue Picture: http://coloncancer.about.com/od/glossaries/g/Epithelial.htmConnective
Tissue Picture: http://www.udel.edu/biology/Wags/histopage/colorpage/cct/cctlct.GIF
Nervous Tissue Picture: http://www.udel.edu/biology/Wags/histopage/colorpage/cne/cnemncb.GIF
Squamous Cell Picture: http://www.stegen.k12.mo.us/tchrpges/sghs/ksulkowski/images/10_Simple_Squamous_Apical_Epithelial_Tissue.jpg
Cuboidal Cell Picture: http://www.stegen.k12.mo.us/tchrpges/sghs/ksulkowski/images/18_Stratified_Cuboidal_Epithelial_Tissue.jpg
Columnar Cell Picture: http://www.stegen.k12.mo.us/tchrpges/sghs/ksulkowski/images/24_Pseudostratified_Columnar_Epithelial_Tissue.jpg
Skeletal Tissue Cell: http://clcpages.clcillinois.edu/home/bio567/pages/newtissues/Skeletal%20muscle%2003a.jpg
Cardiac Tissue Cell: http://micro.magnet.fsu.edu/primer/anatomy/brightfieldgallery/images/mammalcardiacmusclesmall.jpg
Smooth Tissue Cell: http://anatomy.iupui.edu/courses/histo_D502/D502f04/Labs.f04/digestive%20III%20lab/s63.40x.gb.2.jpg
Skeletal Muscles Vi​deo: http://www.neok12.com/php/watch.php?v=zX425a62545f0776607a4367&t=Skeletal-System