Types of skeleton. Prepared By : Sadia khurshid Lecturer , Zoology Department DA Degree College for Women, Phase VIII . The Skeletal System. The supporting tissues of animals which often serve to protect the body, or parts of it, and play an important role in the animal's physiology.
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Prepared By :
Lecturer , Zoology Department
DA Degree College for Women, Phase VIII
The supporting tissues of animals which often serve to protect the body, or parts of it, and play an important role in the animal's physiology.
Octopus octopus marginatus
In soft bodied land animals such as earthworms, this support is provided by a hydrostatic skeleton, which works by internal pressure. The animal’s body fluids press out against its skin, giving the animal its shape. When the pressure of coelomic fluid is decreased its result in a relaxation of muscles.
The force of attraction in hydrostatic skeleton animal like earthworm is applied to a fluid filled cavity called coelom.
Successive peristaltic waves begin at the front and move towards the end of the body
testate amoebae or Arcellinida, usually found in freshwaters and
mosses, and rarely in soils.
A key characteristic of Arcella is the circular test with a hole on its center from where finger-like pseudopods emerge. It is one of the largest testacean genera.
Foraminifera (forams for short) are single-celled protists with shells. Their shells are also referred to as tests because in some forms the protoplasm covers the exterior of the shell.
A typical foram : In the inside which the foram lives. Radiating from the picture about, the dark brown structure is the test, or shell, opening are fine hair like reticulopodia, which the foram uses to find and capture food.