what are the type of tissues and it explains
Answers
Explanation:
Tissue types
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Tissue types
Author: Julie Doll BSc, MSc • Reviewer: Dimitrios Mytilinaios MD, PhD
Last reviewed: October 29, 2020
Reading time: 19 minutes
Surface epithelium; Image:
Surface epithelium
A tissue is a group of cells, in close proximity, organized to perform one or more specific functions.
There are four basic tissue types defined by their morphology and function: epithelial tissue, connective tissue, muscle tissue, and nervous tissue.
Epithelial tissue creates protective boundaries and is involved in the diffusion of ions and molecules.
Connective tissue underlies and supports other tissue types.
Muscle tissue contracts to initiate movement in the body.
Nervous tissue transmits and integrates information through the central and peripheral nervous systems.
Key facts about the tissue types
Epithelial Tissue
Features - high cellularity, special sensory receptors, forms a barrier, avascular, innervated
Surfaces - basal (hemidesmosomes, basement membrane), apical (lumen, microvilli, cilia, stereocilia), lateral (adhering junctions, tight junctions, desmosomes, gap junctions)
Types - squamous, cuboidal, columnar, simple, stratified, pseudostratified, specialized
Connective Tissue
Structure - cells (structural, immunological, defense, energy reservoirs), extracellular matrix (ground substance, protein fibers)
Types of fibers - collagen, reticular, elastic
Classification - proper (dense, loose), embryonic (mesenchyme, mucous), specialized (cartilage, adipose, bone, blood)
Muscle Tissue
Features - elastic, extensible, contractile
Types - skeletal, cardiac (gap junctions, intercalated discs), smooth, striated, nonstriated
Nervous Tissue
Neurons - soma, dendrites, axons, ganglia (PNS), nuclei (CNS)
Glia - astrocytes, oligodendrocytes, Schwann cells, microglia - blood-brain barrier
Answer:
Tissues are group of cells that have a similar structure and act together to perform a specific functions.
★There are four types of tissues in animals:- connective, muscular, nervous and epithelial tissue.
★There are three types of tissues in plants:- Vascular, ground and epidermal tissue.