Question

A tissue is a group of cells, which are
a. Similar in origin, but dissimilar in form and function
b. Dissimilar in origin, form and function
c. Dissimilar in origin, but similar in form and function
d. Similar in origin, form and function

Answer 1

Hint: Tissue is an organisation at cellular level between cells and organs of the body. Similar tissues group together to make an organ which helps in performing specific roles of the body. Group of cells which are specialised in performing the same role assemble to form tissue of the body. The study of human and animal tissues is known as histology.

Complete answer:
A tissue is a group of similar cells ensemble together along with their extracellular matrix from the same origin that together carries the specific function of the body. These ensembled cells are similar in origin, form and function which form a tissue and similar tissues together form an organ. There are four types of tissues in the body of animals which are nervous, connective, muscular and epithelial tissues. For example epithelium tissues are formed of ectoderm and endoderm cells with the help of mesoderm forming the endothelium. These tissues cover the body externally in the form of skin and help to save from environmental conditions. In plants tissues are classified into three types, which are epidermis, ground tissue and vascular tissue.

Hence, The correct answer is option (D).

Note: The word tissue derives from french word “tissu” which means something and verb tisser to weave. The study of animal tissue is known as histology and the study of plant tissue is known as plant anatomy. Electron microscopy, immunofluorescence and frozen tissue-section is used in detailed study of tissues. The term tissue was introduced by Xavier Bichat in 1801.