Tissues Flashcards
What is a tissue?
A tissue is a group or layer of similarly specialized cells that join together to perform certain specific functions.
What is histology?
Histology is the microscopic study of the structure, composition and function of tissues (hist means tissue, and-ology means a study of).
What is a histologist?
A histologist is a non-physician specialist, who studies the microscopic structure of tissues (hist means tissue and -ologist means specialist)
What are the four main types of tissues?
Epithelial tissue, connective tissue, muscle tissue, and nerve tissue
What does epithelial tissue form ? (2 ans.)
Epithelial tissue forms a protective covering for all of the internal and external surfaces of the body. These tissues also form glands.
What is epithelium?
Epithelium is the specialized epithelial tissue that forms the epidermidis of the skin and the surface layer of mucous membranes
What is endothelium?
Endothelium is the specialized epithelial tissue, that lines of blood and lymph vessels, body cavities, glands, and organs.
What is connective tissue?
Connective tissues support and connect organs and other body tissues.
What are the four types of connective tissue?
Dense connective tissue, adipose tissue, loose connective tissue, and liquid connective tissue
Dense connective tissue consists of
Bone and cartilage, they formed the joints and framework of the body
Adipose tissue, also known as..
Adipose tissue provides..
Fat
Protective, padding, insulation, and support (adipose means fat, and -one means pertaining to)
Loose connective tissue surrounds..
Various organs and supports both nerve cells and blood vessels
What are liquid connective tissues?
Blood and lymph, they transport nutrients and waste products throughout the body
Muscle tissue contains
Cells with the specialized ability to contract and relax
Nerve tissue contains
Cells with the specialized ability to react to stimuli and to conduct electrical impulses
Incomplete tissue formation: aplasia
Is the defective development or the congenital absence, of an organ or tissue
(..a- means without, and -plasma means formation)
Incomplete tissue formation: hypoplasia
The incomplete development of an organ or tissue usually due to a deficiency in the number of cells (hypo- means deficient and -plasia means formation)
Abnormal tissue formation: anaplasia
A change in the structure of cels and in their orientation to each other (Ana- means backward, and -plasia means formation). This abnormal cell development is characteristic of tumor formation in cancers
Abnormal tissue formation: dysplasia
Abnormal development or growth of cells, tissues, or organs (dys- means bad, and -plasia means formation).
Abnormal tissue formation: hyperplasia
Enlargement of an organ or tissue because of an abnormal increase in the # of cells in the tissues (hyper- means excessive, and -plasia means formation)
Abnormal tissue formation: hypertrophy
Is a general increase in the bulk of a body part or organ that is due to an increase in the size, but not in the number, of cells in the tissues (hyper- means excessive, and -trophy means development). Enlargement is not due to tumor formation
