Answer:
Explanation:
The animal body consists of different types of cells. The cells have arisen from unspecialized cells such as stem cells. The stem cells are the totipotent cells that have the capacity of producing different types of cells. The cells are grouped to perform a particular function and called tissues.
The tissues are an aggregation of cells having a similar structure and function. There are mainly 4 types of tissues epithelial tissue, connective tissue, muscular tissue, nervous tissue.
The epithelial tissues are also 2 types are single epithelial, compound epithelium. The simple epithelial tissues are single-layered cells, and compound epithelial tissue is multilayered cells.
The simple epithelial cells are squamous epithelium, cuboidal epithelium, columnar epithelium, pseudostratified epithelium.
Connective tissues: These are binding tissues, connect different tissues with the body parts. These tissues consist of cellular parts and ground substances. The connective tissues are 3 types - connective tissue proper, skeletal tissues (bone and cartilage), vascular (blood and lymph).
Muscular tissue :
These are the specialized tissues meant for contraction and relaxation. Muscular tissue contains 2 contractile tissues - actin and myosin. Muscular tissue is types - striated muscle, smooth muscle, and cardiac muscle.
Nervous tissue: These are highly excitable cells, carry impulse. These include the neurons. Nervous tissues arise from the ectoderm.
