Microscope at 400X. . Unlike epithelial tissue, which is composed of cells closely packed with little or no extracellular space in between, connective tissue cells are dispersed in a matrix. Blood and lymph are the two types of connective tissue in this sub-category. Areolar tissue is the most common loose connective tissue you have, found ALL over your body, 02:59 just under your epithelial tissue, and wrapped around your organs. The external ear contains elastic cartilage. Adipose cells store surplus energy in the form of fat and contribute to the thermal insulation of the body. Adipose tissue is distributed within two compartments of the human body: Parietal or subcutaneous fat, which is embedded in the connective tissue under the skin ; Visceral fat, which surrounds the internal organs, such as eyeballs (periorbital fat) or kidneys (perirenal fat capsule). It consists of narrow spindle-shaped cells with a single, centrally located nucleus. Epithelial Tissue: Epithelial cells are closely packed together. Collagenous connective tissue is divided into two types, based upon the ratio of collagen fibers to ground substance. The lungs and arteries have a layer of elastic connective tissue that allows the stretch and recoil of these organs. The tumors generally consist of sheets of nearly identical cells with strands of connective tissue interspersed among them. Adipose tissue consists mostly of fat storage cells called adipocytes that store lipids as droplets that fill most of the cytoplasm (figure 4.6). As may be obvious from its name, one of the major functions of connective tissue is to connect tissues and organs. Dense connective tissue is reinforced by bundles of fibers that provide tensile strength, elasticity, and protection. http://cnx.org/contents/14fb4ad7-39a1-4eee-ab6e-3ef2482e3e22@7.1@7.1. Unlike cartilage, bone tissue can recover from injuries in a relatively short time. Epithelial Tissue: Epithelial tissue line the cavity and surfaces of organs and blood vessels throughout the animal body. Osteoblasts- are the type of cells that form the matrix andcollagen fibers. Finding a free (apical surface) The first step in finding epithelium on a … The different types of connective tissue are so diverse, there is no one set of characteristics that encompasses all the different types. In this photo of areolar connective tissue, nuclei of cells are stained but the cytoplasm is pale and not distinguishable. Game Points. Histological for human physiology. Connective tissue has the most types of subcategories and the most varied functions of all the four major tissue types (epithelial, muscular, nervous, and connective tissues.) Smooth muscle tissue, unlike striated muscle, contracts slowly and automatically. Types of cells that can be viewed under a basic compound microscope include cork cells plant cells and even human cells scraped from the inside of the cheek. Bones and cartilage are the two types of connective tissue in this sub-category. Skeletal muscle tissue is arranged in bundles surrounded by connective tissue. Polysaccharides and proteins secreted by fibroblasts combine with extra-cellular fluids to produce a viscous ground substance that, with embedded fibrous proteins, forms the extra-cellular matrix. Connective Tissue – Fibers and Ground Substance, http://virtualslides.med.umich.edu/Histology/Cardiovascular%20System/081-3_HISTO_40X.svs/view.apml, https://www.studyblue.com/notes/note/n/histology/deck/15076281. Image of blue, connective, loose - 130916821 Protection is another major function of connective tissue, in the form of fibrous capsules and bones that protect delicate organs and, of course, the skeletal system. It contains all the cell types and fibers previously described and is distributed in a random, web-like fashion. The proteoglycan attracts and traps available moisture forming the clear, viscous, colorless matrix you now know as ground substance. Erythrocytes, red blood cells, transport oxygen and some carbon dioxide. It is lighter than compact bone and found in the interior of some bones and at the end of long bones. Hyaline cartilage 400X Cartilage consists of cells embedded in a matrix (mat) of fibers and ground substance. Nutrients, salts, and wastes are dissolved in the liquid matrix called plasma and transported through the body. Connective tissue is found throughout the body, usually in association with other tissues. Blood is no exception, but its cells float freely in a liquid matrix. It provides protection to internal organs and supports the body. Basically, there are four types of tissues: nervous, muscle, epithelial, and connective. 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