Whether your talking about delicate tissue of the brain or the hardness of bone, it's still made of cells banded together into tissue and organized into organs. Sign up for our Health Tip of the Day newsletter, and receive daily tips that will help you live your healthiest life. Khan YS, Farhana A. Histology, cell. Updated May 10, Standring S, ed. Section 1: Cells, tissues, and systems.
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These choices will be signaled globally to our partners and will not affect browsing data. We and our partners process data to: Actively scan device characteristics for identification. I Accept Show Purposes. A tissue is a structure with similar types of specialized cells that perform unique functions in the body of multicellular organisms. Animals have four types of tissues; epithelial tissue, connective tissue, muscular tissue, and nerve tissue.
Epithelial tissues line the surfaces and cavities of the body, protecting the body from dehydration and mechanical damage. Connective tissue connects and binds separate tissues and organs together.
The connective tissue is composed of few cells, embedded in a matrix, which is secreted by the cells in the connective tissue. Muscular tissue is involved in controlling internal body functions such as digestion, respiration, urination as well as external body functions such as movement of body parts. Nerve tissue coordinate both internal and external functions of the body with the different stimuli.
The four types of animal tissues are shown in figure 1. Figure 1: Four Tissue Types. Plants also consist of three tissue types known as epidermis, vascular tissues, and ground tissues. Epidermis lines all the body parts of the plant such as stem, leaves, and roots. Vascular tissue is involved in transporting water and nutrients throughout the plant body.
Ground tissue is involved in photosynthesis and storage of food. An organ is a part of an organism, which performs a set of unique functions in the body. An organ is an incorporation of several types of tissue. There's connective tissue and these are things like bone and cartilage and a little less obviously blood.
But they often share one common feature that they'll have is that they produce this thing called a matrix around them whether it's the hard bones, the calcium phosphate and other salts that form the hard bones or the liquidy goo that the blood cells produce that we call blood plasma.
Nervous tissue obviously includes things like neurons and the photoreceptors in your eyes. They send and receive signals really well. And muscle tissue are the cells like in they could be a skeleton muscle and cardiac muscle tissue and muscle tissue that have the capability to do a movement called contraction.
Now an organ is a a structure that's made of a number of different kinds of tissue all put together and organised in order to carry out a very specific function. For example your stomach is an organ, your brain is an organ, my bicep muscle's an organ, my tongue is an organ. These are all examples of combinations of different tissues. My stomach for example has some muscle tissue in it to help mix up the food as well as epithelial tissue to start dumping in some of the digestive enzymes.
Most organs contain more than one tissue type. For example, the stomach consists of smooth muscle tissue for churning movement while it is innervated, but it is also supplied by blood, which is a connective tissue.
The next level is the organ system level. Many organs working together to accomplish a common purpose create an organ system. For example, the heart and the blood vessels of the cardiovascular system circulate blood and transport oxygen and nutrients to all the body cells.
Levels of Organization : Molecules form cells. Cells form tissues, and tissues form organs.
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