Structural Organisation in Animals


  1. The cells lining the blood vessels belong to the category of:









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    The lining of a blood vessel is with simple squamous epithelium. Inner most lining of blood vessels is called endothelium. “Squamous” refers to the fact that the cells are flat.

    Correct Option: B

    The lining of a blood vessel is with simple squamous epithelium. Inner most lining of blood vessels is called endothelium. “Squamous” refers to the fact that the cells are flat.


  1. Choose the correctly matched pair:









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    Tendon is dense regular connective tissue. Adipose tissue is a type of loose connective tissue located mainly beneath the cells. Cartilage is a type of specialised connetive tissue.

    Correct Option: C

    Tendon is dense regular connective tissue. Adipose tissue is a type of loose connective tissue located mainly beneath the cells. Cartilage is a type of specialised connetive tissue.



  1. The layer of actively dividing cells of skin is termed as









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    It is the innermost one celled thick layer made up of columnar epithelial cells. It lies on a basement. These cells are active & continuously produce new cells by mitotic division and is thus called germinative layer or stratum germinativum. The division rate of these cells is highest during sleep or rest and lowest during muscular activity & stress.

    Correct Option: C

    It is the innermost one celled thick layer made up of columnar epithelial cells. It lies on a basement. These cells are active & continuously produce new cells by mitotic division and is thus called germinative layer or stratum germinativum. The division rate of these cells is highest during sleep or rest and lowest during muscular activity & stress.


  1. Epithelial tissue with thin flat cells appearing like packed tiles occurs on









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    Squamous epithelial cells have the appearance of thin, flat plates. The shape of the nucleus usually corresponds to the cell form and helps to identify the type of epithelium. Squamous cells, for example, tend to have horizontal flattened, elliptical nuclei because of the thin flattened form of the cell. They form the lining of cavities such as the mouth, blood vessels, heart and lungs and make up the outer layers of the skin.

    Correct Option: A

    Squamous epithelial cells have the appearance of thin, flat plates. The shape of the nucleus usually corresponds to the cell form and helps to identify the type of epithelium. Squamous cells, for example, tend to have horizontal flattened, elliptical nuclei because of the thin flattened form of the cell. They form the lining of cavities such as the mouth, blood vessels, heart and lungs and make up the outer layers of the skin.



  1. The cell junctions called tight, adhering and gap junctions are found in









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    The cell junctions known as tight, adhering and gap junctions are found in epithelial tissue. Epithelial tissue covers the whole surface of the body. It is made up of cells closely packed and ranged in one or more layers. This tissue is specialised to form the covering or lining of all internal and external body surfaces. Epithelial tissue that occurs on surfaces of the interior of the body is known as endothelium.

    Correct Option: B

    The cell junctions known as tight, adhering and gap junctions are found in epithelial tissue. Epithelial tissue covers the whole surface of the body. It is made up of cells closely packed and ranged in one or more layers. This tissue is specialised to form the covering or lining of all internal and external body surfaces. Epithelial tissue that occurs on surfaces of the interior of the body is known as endothelium.