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    Tissue consists of many cells that have the same origin and act together to perform common functions. Different tissues vary in size, shape, and function of cells. According to their structure and function, there are four main tissue types, including epithelial, connective, muscular, and neural tissues. Organs are formed by two or more tissues that serve a common purpose. For example, the heart is composed of muscle tissue, connective tissue, and covering and lining tissue arranged to form a muscular pump. The heart also contains and supplies neural tissue. A system consists of related organs with common functions. For example, the cardiovascular system contains the heart, blood vessels, and blood.

    Epithelial tissue (epithelium) can be divided into covering and lining epithelium and glandular epithelium. The epithelium covers the internal and external organs and lines blood vessels, body cavities, glands, and organs. The glandular epithelium is composed of secretory cells and is a component of glands such as sweat and salivary glands. Connective tissue contains many different cell types and is involved in a variety of functions. It is found in the skin, membranes, muscles, bones, nerves, and internal organs. The main functions of connective tissue include connecting tissues to each other, supporting and strengthening other tissues, protecting organs, transporting blood, storing energy and minerals, and defending against potentially harmful microorganisms. Unlike epithelial tissue, connective tissue has extracellular material between cells. Muscle tissue is a specialized tissue that is composed of muscle fibers. It can contract and relax, and is therefore able to produce movement. There are three types of muscle tissues in the body: skeletal, myocardial, and smooth. The main functions of muscle tissue are generating movement, maintaining body posture, and generating heat. The neural tissue is made up of nerve cells and supporting cells called neuroglia. Sensory nerve cells or neurons receive incoming stimuli, transmit the signal to the central nervous system, where it is interpreted and, if appropriate, generates a response to the stimulus.

    Animal biological samples including cells, tissues, and organs are widely used in scientific research. They can be obtained from animals by direct isolation or by in vitro fabrication and modification for use at later time points and in different geographical locations. Special treatment and cryopreservation can maintain and extend the life and function of biological samples outside their native environment and conditions, enabling their wide distribution, transport, and application. Amerigo Scientific offers a wide range of fresh or frozen animal tissues for research use to save time and ensure the reproducibility of studies. We also offer reliable, consistent products such as lysates and lyophilized powders to meet a variety of research needs.

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