The varitions of animal tissues according to the structure and functions.
Some parts of an animal are very hard while others are soft or like a liquid. These variations are specialized to perform the animal's particular functions. Tissues are group of cells of one type or different types which are specialized to perform a particular function and have common origin. Animal bodies are comprised of several tissues.
BLOOD TISSUE
* Consists of blood plasma and blood cells.
* Red blood cells transport oxygen.
* White blood cells protect the body from diseases.
* Platelets are important in blood clotting.
MUSCLE TISSUE
* Composed of muscle fibers.
* Classified into three groups.
Skeletal muscle
* Participates in moving body parts.
* Attached to the skeleton by tendons.
* Fibers are striated.
* Muscles are voluntary.
Cardiac muscle
* Made up of branched and striated muscles.
* Uni-nucleated.
* Fibers have large number of mitochondria.
* Muscles are involuntary.
Smooth muscle
* Spindle shaped and unstriated muscles.
* Uni-nucleated.
* Muscles are involuntary.
* Can found in intestine, stomach, blood vessels, urinary system
etc.
EPITHELIAL TISSUE
* Functions as a lining tissue.
* Main functions are sensory, protection, absorption, and
secretion.
* Classified into three groups.
• Squamous epithelium
• Cuboidal epithelium
• Columnar epithelium
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