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  2. Tissue (biology) - Wikipedia

    en.wikipedia.org/wiki/Tissue_(biology)

    Animal tissues are grouped into four basic types: connective, muscle, nervous, and epithelial. [4] Collections of tissues joined in units to serve a common function compose organs. While most animals can generally be considered to contain the four tissue types, the manifestation of these tissues can differ depending on the type of organism.

  3. Histology - Wikipedia

    en.wikipedia.org/wiki/Histology

    There are four basic types of animal tissues: muscle tissue, nervous tissue, connective tissue, and epithelial tissue. [5] [9] All animal tissues are considered to be subtypes of these four principal tissue types (for example, blood is classified as connective tissue, since the blood cells are suspended in an extracellular matrix, the plasma). [9]

  4. Anatomy - Wikipedia

    en.wikipedia.org/wiki/Anatomy

    However, substantially similar structures and tissues are found throughout the rest of the animal kingdom, and the term also includes the anatomy of other animals. The term zootomy is also sometimes used to specifically refer to non-human animals. The structure and tissues of plants are of a dissimilar nature and they are studied in plant ...

  5. Human anatomy - Wikipedia

    en.wikipedia.org/wiki/Human_anatomy

    The human body consists of biological systems, that consist of organs, that consist of tissues, that consist of cells and connective tissue. The history of anatomy has been characterized, over a long period of time, by a continually developing understanding of the functions of organs and structures in the body.

  6. Connective tissue - Wikipedia

    en.wikipedia.org/wiki/Connective_tissue

    Connective tissue is one of the four primary types of animal tissue, a group of cells that are similar in structure, along with epithelial tissue, muscle tissue, and nervous tissue. [1] It develops mostly from the mesenchyme , derived from the mesoderm , the middle embryonic germ layer . [ 2 ]

  7. Organ (biology) - Wikipedia

    en.wikipedia.org/wiki/Organ_(biology)

    In a multicellular organism, an organ is a collection of tissues joined in a structural unit to serve a common function. [1] In the hierarchy of life, an organ lies between tissue and an organ system. Tissues are formed from same type cells to act together in a function. Tissues of different types combine to form an organ which has a specific ...

  8. Fibroblast - Wikipedia

    en.wikipedia.org/wiki/Fibroblast

    A fibroblast is a type of biological cell typically with a spindle shape [1] that synthesizes the extracellular matrix and collagen, [2] produces the structural framework for animal tissues, and plays a critical role in wound healing. [3] Fibroblasts are the most common cells of connective tissue in animals.

  9. Muscle - Wikipedia

    en.wikipedia.org/wiki/Muscle

    The body mass of an average adult man is made up of 42% of skeletal muscle, and an average adult woman is made up of 36%. [6] Cardiac muscle tissue is found only in the walls of the heart as myocardium, and it is an involuntary muscle controlled by the autonomic nervous system. Cardiac muscle tissue is striated like skeletal muscle, containing ...