organisms from tissues consist of animals and plants on the planet.They are different, and every kind of fabric performs its functions.
consist What fabric?
the smallest structural part of the body is a cage.Among them and comprise all types of fabric - both plant and animal.
structure of cells
This structure can exist as a separate body.One cell includes such creatures as bacteria and protozoa eukaryotes.This component consists of a living organism such parts: plasma membrane, cytoplasm, represented colloidal solution, the nucleus and organelles - permanent structures, each of which performs a specific function.The structure of the animal cell organelles are present: the cell center, ribosomes, lysosomes, mitochondria, Golgi apparatus and endoplasmic reticulum.Plant cells differ from them in that they contain vacuoles (first few and the aging cell, they merge into one central) as well as plastids: chromoplasts, leucoplasts and chloroplasts.
plasma membrane of animal cell consists of three layers: two protein and lipid between them.This shell, in turn, is surrounded by glycocalyx, which is composed of polysaccharides, glycolipids, glycoproteins.Organelles perform the following functions: cell center - distribution of chromosomes in dividing, ribosomes - the synthesis of proteins, the lysosomes - splitting of substances with enzymes, mitochondria - power generation, Golgi apparatus - the accumulation and conversion of certain substances, endoplasmic reticulum (reticulum) - transportation of chemical compounds.Number certain organelles within the cell depends on what type of the fabric, it enters.
structure of animal tissues
animal tissue is composed of cells, intercellular substance combined.Depending on the destination of the fabric, it may have a different composition, present in greater or lesser amounts.Fabrics animals exist the following types:
- coupling;
- epithelial;
- nervous;
- muscle.
Connective tissues
They come in such types: dense and loose fibrous cartilage, bone, blood and lymph, fat, reticulum.They are united by the large number of intercellular substance.The dense fibrous tissue consists primarily of filaments, loose fiber - an amorphous mass.Bone has a large number of solid intercellular substance composed of inorganic chemical compounds.Intercellular substance of cartilage consists of organic substances.The reticular fabric contains stem cells from which blood cells are formed.The composition of the blood and lymph fluid includes a large number.The structure of this type of animal tissue is composed of specific cells, they are also called blood cells.Their views:
- red blood cells;
- leukocytes;
- platelets.
Each of them carries out its functions.Erythrocytes are presented as circular structures containing hemoglobin.They are responsible for the transport of oxygen throughout the body.White blood cells perform immune function.Platelets are responsible for blood clotting when the skin is damaged.
epithelial tissue of animals
epithelium divided into several types:
- flat;
- cubic;
- cylindrical;
- ciliated;
- touch;
- glandular.
presented flattened squamous epithelium cells, which have the shape of polygons.This is the tissue in the oral cavity and esophagus.Cubic animal epithelial tissue lining the kidney tubules, cylindrical - stomach and intestines, ciliated - airways, touch - the nasal cavity.Glandular is a component of the glands.The cells of this particular tissue and produce hormones, milk and so on. D.
Muscle tissue
They are also divided into several types:
- striped;
- smooth;
- heart.
muscular tissue of the first animal species is a component of the muscles of the musculoskeletal system.Formed from smooth muscles of viscera, for example of the intestine, stomach, uterus, and t. D. Cardiac characterized in that its fibers are intertwined - it will allow them to contract.
nervous tissue of animals
This type of fabric consists of veretenopodobnyh, stellate, or spherical cells - neurons, and intercellular substance - mesogloea that provides nutrients to neurons.Neurons consist of a body, an axon and dendrites - processes by which cells are connected.They are necessary for the signal.
